A child wearing a face mask poses for a picture as passengers enjoy an open-top sightseeing bus tour, operated by Hato Bus Co., as the tour service resumed after Japan's government lifted the coronavirus disease (COVID-19) state of emergency in the Tokyo area, in Tokyo, Japan March 22, 2021. REUTERS/Androniki Christodoulou

A tour guide of Hato Bus Co. disinfects seats of an open-top sightseeing bus, as the tour service resumed after Japan's government lifted the coronavirus disease (COVID-19) state of emergency in the Tokyo area, in Tokyo, Japan March 22, 2021. REUTERS/Androniki Christodoulou

Passengers wearing protective face masks enjoy viewing blooming cherry blossoms from an open-top sightseeing bus, operated by Hato Bus Co., after Japan's government lifted the coronavirus disease (COVID-19) state of emergency in the Tokyo area, in Tokyo, Japan March 22, 2021. REUTERS/Androniki Christodoulou

Passengers wearing protective face masks enjoy the viewing of Tokyo Station building from an open-top sightseeing bus, operated by Hato Bus Co., after Japan's government lifted the coronavirus disease (COVID-19) state of emergency in the Tokyo area, in Tokyo, Japan March 22, 2021. REUTERS/Androniki Christodoulou

Passengers wearing protective face masks enjoy viewing blooming cherry blossoms from an open-top sightseeing bus, operated by Hato Bus Co., after Japan's government lifted the coronavirus disease (COVID-19) state of emergency in the Tokyo area, in Tokyo, Japan March 22, 2021. REUTERS/Androniki Christodoulou

A tour guide of Hato Bus Co. works at an open-top sightseeing bus as the tour service resumed after Japan's government lifted the coronavirus disease (COVID-19) state of emergency in the Tokyo area, in Tokyo, Japan March 22, 2021. REUTERS/Androniki Christodoulou

A flight attendant wearing an Xpore top designed for safe traveling, walks the catwalk during a sightseeing flight, amid the spread of the coronavirus disease (COVID-19), in Taipei, Taiwan November 19, 2020. REUTERS/Ann Wang TPX IMAGES OF THE DAY

Flight attendants wear Xpore made tops designed for safe traveling amid the spread of the coronavirus disease (COVID-19), during a sightseeing flight in Taipei, Taiwan November 19, 2020. REUTERS/Ann Wang

Flight attendants wear Xpore made tops designed for safe traveling amid the spread of the coronavirus disease (COVID-19), during a sightseeing flight in Taipei, Taiwan November 19, 2020. REUTERS/Ann Wang

Passengers take a selfie while wearing protective outfit before boarding a sightseeing flight, amid the spread of the coronavirus disease (COVID-19), in Taipei, Taiwan November 19, 2020. REUTERS/Ann Wang

People wearing protective outfits prepare to board a sightseeing flight, amid the spread of the coronavirus disease (COVID-19), in Taipei, Taiwan November 19, 2020. REUTERS/Ann Wang

A flight attendant serves food to passengers during a sightseeing flight, amid the spread of the coronavirus disease (COVID-19), in Taipei, Taiwan November 19, 2020. REUTERS/Ann Wang

A monitor shows the route of a sightseeing flight, during the global outbreak of the coronavirus disease (COVID-19), in Taipei, Taiwan November 19, 2020. REUTERS/Ann Wang

A woman wearing a protective face mask takes pictures at a sightseeing spot, with the Moscow International Business Centre seen in the background, in Moscow, Russia November 6, 2020. REUTERS/Evgenia Novozhenina

A woman holds an umbrella while walking along a sightseeing spot in Moscow, Russia November 6, 2020. REUTERS/Evgenia Novozhenina

Visitors wearing protective face masks practice social distancing as they offer prayers at a temple at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

A sign for 'Go To Travel' campaign, a Japanese government-backed travel discount program encouraging domestic travel to help boost the economy, is displayed at a traditional rice crackers store along Nakamise Street at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

A sign for 'Go To Travel' campaign, a Japanese government-backed travel discount program encouraging domestic travel to help boost the economy, is displayed at a souvenir shop along Nakamise Street at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

Visitors wearing protective face masks are seen at a temple at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

Visitors wearing protective face masks are seen at a temple at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

Kimono-clad tourists wearing protective face masks are seen at a temple at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

Kimono-clad tourists wearing protective face masks are seen at a temple at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

Visitors wearing protective face masks walk along Nakamise Street at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

Kimono-clad tourists wearing protective face masks walk along Nakamise Street at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

Kimono-clad tourists wearing protective face masks walk along Nakamise Street at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan October 13, 2020. REUTERS/Issei Kato

A sightseeing bus passes Oxford University building, amid the spread of the coronavirus disease (COVID-19), in Oxford, Britain, October 6, 2020. REUTERS/Matthew Childs

People sit on a sightseeing boat on the River Thames, amid the coronavirus disease (COVID-19) outbreak, in London, Britain, August 21, 2020. REUTERS/Henry Nicholls

Passersby wearing protective face masks are seen at Takeshita Street, a popular sightseeing spot amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan July 29, 2020. REUTERS/Issei Kato

A woman in yukata, or casual summer kimono, poses for a photo at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan July 22, 2020. REUTERS/Issei Kato

Mannequins in Japanese traditional costumes and wearing protective face masks are displayed at a souvenir shop at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan July 22, 2020. REUTERS/Issei Kato

Visitors wearing protective face masks walk along Nakamise Street at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan July 22, 2020. REUTERS/Issei Kato

An elderly woman wearing a protective face mask walks at a Buddhist temple at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan July 22, 2020. REUTERS/Issei Kato

Women in yukata, or casual summer kimonos, wearing protective face masks, walk along Nakamise Street at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan July 22, 2020. REUTERS/Issei Kato

Women in yukata, or casual summer kimonos, wearing protective face masks, walk along Nakamise Street at Asakusa district, a popular sightseeing spot, amid the coronavirus disease (COVID-19) outbreak in Tokyo, Japan July 22, 2020. REUTERS/Issei Kato

Passengers Pia Rusp and Michael Rusp from Germany walk during a sightseeing following the coronavirus disease (COVID-19) outbreak in Budapest, Hungary, July 17, 2020. Picture taken July 17, 2020. REUTERS/Bernadett Szabo REFILE - CORRECTING NAMES

People take part in a campaign by Israel's Nature and Parks Authority calling on Israelis to join sightseeing tours and find comfort in tree hugging amid a spike in the coronavirus disease (COVID-19), in Apollonia National Park, near Herzliya, Israel July 7, 2020. Picture taken July 7, 2020. REUTERS/Ronen Zvulun TPX IMAGES OF THE DAY

A woman takes part in a campaign by Israel's Nature and Parks Authority calling on people to join sightseeing tours and find comfort in tree hugging amid a spike in the coronavirus disease (COVID-19), in Jerusalem July 9, 2020. Picture taken July 9, 2020. REUTERS/Ronen Zvulun

A couple take part in a campaign by Israel's Nature and Parks Authority calling on Israelis to join sightseeing tours and find comfort in tree hugging amid a spike in the coronavirus disease (COVID-19), as part of Jerusalem's Old City walls are seen in the background July 9, 2020. Picture taken July 9, 2020. REUTERS/Ronen Zvulun

A couple take part in a campaign by Israel's Nature and Parks Authority calling on Israelis to join sightseeing tours and find comfort in tree hugging amid a spike in the coronavirus disease (COVID-19), in Apollonia National Park, near Herzliya, Israel July 7, 2020. Picture taken July 7, 2020. REUTERS/Ronen Zvulun

People take part in a campaign by Israel's Nature and Parks Authority calling on Israelis to join sightseeing tours and find comfort in tree hugging amid a spike in the coronavirus disease (COVID-19), in Apollonia National Park, near Herzliya, Israel July 7, 2020. Picture taken July 7, 2020. REUTERS/Ronen Zvulun

A tour guide adjust her face mask to protect herself from the coronavirus disease (COVID-19) in an empty Taipei Sightseeing bus in Taipei, Taiwan, May 22, 2020. REUTERS/Ann Wang

A tour guide speaks to a microphone while wearing a face mask to protect herself from the coronavirus disease (COVID-19) in an empty Taipei Sightseeing bus in Taipei, Taiwan, May 22, 2020. REUTERS/Ann Wang

A staff member collects equipments after disinfecting a Taipei Sightseeing bus before the bus head out on the designated route to various tourist sites across the city in Taipei, Taiwan, May 22, 2020. REUTERS/Ann Wang

A staff wears a full body protective suit while disinfecting a Taipei Sightseeing bus before the bus head out on the designated route to various tourist sites across the city in Taipei, Taiwan, May 22, 2020. REUTERS/Ann Wang

A staff takes off a full body protective suit after disinfecting a Taipei Sightseeing bus before the bus head out on the designated route to various tourist sites across the city in Taipei, Taiwan, May 22, 2020. REUTERS/Ann Wang

A passerby walks between temporally closed shops at almost empty Nakamise Street as the spread of the coronavirus disease (COVID-19) continues, at Asakusa district, a popular sightseeing spot, in Tokyo, Japan May 21, 2020. REUTERS/Issei Kato

A passerby wearing a protective face masks walks between temporally closed shops along Nakamise Street as the spread of the coronavirus disease (COVID-19) continues, at Asakusa district, a popular sightseeing spot, in Tokyo, Japan May 21, 2020. REUTERS/Issei Kato

Passersby wearing protective face masks walk between temporally closed shops along Nakamise Street as the spread of the coronavirus disease (COVID-19) continues, at Asakusa district, a popular sightseeing spot, in Tokyo, Japan May 21, 2020. REUTERS/Issei Kato TPX IMAGES OF THE DAY

People gather at a sightseeing point amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 5, 2020. REUTERS/Maxim Shemetov

People gather at a sightseeing point amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 5, 2020. REUTERS/Maxim Shemetov

Visitors wearing protective face masks walk on a sightseeing spot on Enoshima Island after government asked citizens to be more diligent on social distancing under the state of emergency in Fujisawa, south of Tokyo, Japan April 23, 2020, as the spread of the coronavirus disease (COVID-19) continues. REUTERS/Issei Kato

A man walks along a sightseeing point, after the city authorities announced a partial lockdown ordering residents to stay at home to prevent the spread of coronavirus disease (COVID-19), in Moscow, Russia March 30, 2020. REUTERS/Evgenia Novozhenina

A view from an empty sightseeing point shows Luzhniki Stadium and the Moscow International Business Centre, also known as "Moskva-City", after the city authorities announced a partial lockdown ordering residents to stay at home to prevent the spread of coronavirus disease (COVID-19), in Moscow, Russia March 30, 2020. REUTERS/Evgenia Novozhenina

Tourists sightsee, one of them wearing a protective face mask, in the old city of Tunis, Tunisia March 4, 2020. REUTERS/Zoubeir Souissi

A couple walks at an empty Wat Po temple in Bangkok, Thailand, March 3, 2020. REUTERS/Chalinee Thirasupa

Tourists on a sightseeing cruise ship wave to passengers of the cruise ship Diamond Princess, which is anchored at Daikoku Pier Cruise Terminal in Yokohama, south of Tokyo, Japan February 12, 2020. REUTERS/Kim Kyung-hoon TPX IMAGES OF THE DAY

Tourists on a sightseeing cruise ship wave to passengers of the cruise ship Diamond Princess, which is anchored at Daikoku Pier Cruise Terminal in Yokohama, south of Tokyo, Japan February 12, 2020. REUTERS/Kim Kyung-hoon

A sightseeing boat moves past the cruise ship Diamond Princess, where dozens of passengers were tested positive for coronavirus, at the Daikoku Pier Cruise Terminal in Yokohama, south of Tokyo, Japan February 10, 2020. REUTERS/Kim Kyung-Hoon

People walk along Orne Harbour, Antarctica, February 6, 2020. Picture taken February 6, 2020. Reuters/Ueslei Marcelino

People walk along Orne Harbour, Antarctica, February 6, 2020. Picture taken February 6, 2020. Reuters/Ueslei Marcelino