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

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

A group of Santa Clauses from around the world, ride a sightseeing vehicle as they make their way into Jerusalem's Old City January 5, 2020. REUTERS/Amir Cohen

A group of Santa Clauses from around the world, ride a sightseeing vehicle as they make their way into Jerusalem's Old City January 5, 2020. REUTERS/Amir Cohen

Genex Tower, also known as The Western City gate, stands in Belgrade, Serbia, March 1, 2019. The building consists of two soaring pillars, connected by an aerial bridge. The tower is one of the most significant examples of brutalism, an architectural style popular in the 1950s and 1960s, based on crude, block-like forms cast from concrete. "Genex tower is among the most interesting sight. People see it on their way from the airport and it immediately draws their attention," said Vojin Muncin, manager of the Yugotour sightseeing agency which guides tourists around the Serbian capital. REUTERS/Marko Djurica SEARCH "ARCHITECTURE DJURICA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A man and a boy look at the Tiananmen Gate from a sightseeing bus on Changan Avenue ahead of the 70th founding anniversary of People's Republic of China in Beijing, China September 16, 2019. Picture taken September 16, 2019. REUTERS/Tingshu Wang

People walk on the rocks at the lighthouse at dusk in Peggy's Cove, Nova Scotia, Canada, August 11, 2019. REUTERS/Carlo Allegri

People walk on the rocks at the lighthouse at dusk in Peggy's Cove, Nova Scotia, Canada, August 11, 2019. REUTERS/Carlo Allegri

People walk on the rocks at the lighthouse at dusk in Peggy's Cove, Nova Scotia, Canada, August 11, 2019. REUTERS/Carlo Allegri

Damaged front of the Viking Sigyn sightseeing vessel, which was involved in a ship accident that killed several people on the Danube river, is seen in Budapest, Hungary, May 30, 2019. REUTERS/Bernadett Szabo

A women who works for a bus and boat sightseeing tour company stands in Manhattan, New York, U.S., October 3, 2018. REUTERS/Shannon Stapleton

Model Madeline Stuart, who has Down's syndrome, poses for photographs with her mother Rosanne, while sightseeing in Trafalgar Square in London, Britain, September 16, 2018. REUTERS/Peter Nicholls. SEARCH "MODEL MADELINE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. THE IMAGES SHOULD ONLY BE USED TOGETHER WITH THE STORY - NO STAND-ALONE USES

A lantern is seen in the street in the Old Town of Tallinn, Estonia, August 13, 2018. REUTERS/Maxim Shemetov

Sightseeing boats sit at the Elbe river in Dresden after water levels dropped to an extreme low this summer, Germany July 31, 2018. REUTERS/Fanny Brodersen TPX IMAGES OF THE DAY

Sightseeing boats sit at the Elbe river in Dresden after water levels dropped to an extreme low this summer, Germany July 31, 2018. REUTERS/Fanny Brodersen TPX IMAGES OF THE DAY

Sightseeing boats sit at the Elbe river in Dresden after water levels dropped to an extreme low this summer, Germany, July 31, 2018. REUTERS/Fanny Brodersen

Sightseeing boats sit at the Elbe river in Dresden after water levels dropped to an extreme low this summer, Germany, July 31, 2018. REUTERS/Fanny Brodersen

Sightseeing boats sit at the Elbe river in Dresden after water levels dropped to an extreme low this summer, Germany, July 31, 2018. REUTERS/Fanny Brodersen

Sightseeing boats sit at the Elbe river in Dresden after water levels dropped to an extreme low this summer, Germany, July 31, 2018. REUTERS/Fanny Brodersen

Sightseeing boats sit at the Elbe river in Dresden after water levels dropped to an extreme low this summer, Germany, July 31, 2018. REUTERS/Fanny Brodersen

Sightseeing boats sit at the Elbe river in Dresden after water levels dropped to an extreme low this summer, Germany, July 31, 2018. REUTERS/Martin Schlicht

Sightseeing boats sit at the Elbe river in front of the Academy of Fine Arts after water level dropped to an extreme low this summer in Dresden, Germany, July 9, 2018. Picture taken July 9, 2018. REUTERS/Matthias Rietschel

Sightseeing boats sit at the Elbe river in front of the Academy of Fine Arts after water level dropped to an extreme low this summer in Dresden, Germany, July 9, 2018. Picture taken July 9, 2018. REUTERS/Matthias Rietschel

Sightseeing boats sit at the Elbe river after water level dropped to an extreme low this summer in Dresden, Germany, July 9, 2018. Picture taken July 9, 2018. REUTERS/Matthias Rietschel

Sightseeing boats sit at the Elbe river in front of the Academy of Fine Arts after water level dropped to an extreme low this summer in Dresden, Germany, July 9, 2018. Picture taken July 9, 2018. REUTERS/Matthias Rietschel

Sightseeing boats sit at the Elbe river in front of the Academy of Fine Arts after water level dropped to an extreme low this summer in Dresden, Germany, July 9, 2018. Picture taken July 9, 2018. REUTERS/Matthias Rietschel

Sightseeing boats sit at the Elbe river in front of the Academy of Fine Arts after water level dropped to an extreme low this summer in Dresden, Germany, July 9, 2018. Picture taken July 9, 2018. REUTERS/Matthias Rietschel

Sightseeing boats sit at the Elbe river in front of the Academy of Fine Arts after water level dropped to an extreme low this summer in Dresden, Germany, July 9, 2018. Picture take July 9, 2018. REUTERS/Matthias Rietschel

Posters promoting Fukushima sightseeing, are seen at the Fukushima prefectural government office in Fukushima, Fukushima prefecture, Japan May 18, 2018. Picture taken May 18, 2018. REUTERS/Toru Hanai

North Korean leader Kim Jong Un arrives to the St Regis hotel in his vehicle after a late night sightseeing tour in Singapore, June 11, 2018. REUTERS/Athit Perawongmetha

Journalists and bystanders take pictures of North Korean leader Kim Jong Un's vehicle as he arrives to the St Regis hotel after a late night sightseeing tour in Singapore, June 11, 2018. REUTERS/Kim Kyung-Hoon

Estonia's President Kersti Kaljulaid, Norway's Crown Prince Haakon and Crown Princess Mette-Marit walk during a sightseeing tour at the Old Town of Tallinn, Estonia April 26, 2018. REUTERS/Ints Kalnins

Norway's Crown Prince Haakon and Crown Princess Mette-Marit walk during a sightseeing tour at the Old Town of Tallinn, Estonia April 26, 2018. REUTERS/Ints Kalnins

Estonia's President Kersti Kaljulaid, Norway's Crown Prince Haakon and Crown Princess Mette-Marit walk during a sightseeing tour at the Old Town of Tallinn, Estonia April 26, 2018. REUTERS/Ints Kalnins

Estonia's President Kersti Kaljulaid, Norway's Crown Prince Haakon and Crown Princess Mette-Marit walk during a sightseeing tour at the Old Town of Tallinn, Estonia April 26, 2018. REUTERS/Ints Kalnins

Estonia's President Kersti Kaljulaid, Norway's Crown Prince Haakon and Crown Princess Mette-Marit are seen during a sightseeing tour at the Old Town of Tallinn, Estonia April 26, 2018. REUTERS/Ints Kalnins

Estonia's President Kersti Kaljulaid, Norway's Crown Prince Haakon and Crown Princess Mette-Marit walk during a sightseeing tour at the Old Town of Tallinn, Estonia April 26, 2018. REUTERS/Ints Kalnins

Norway's Crown Prince Haakon and Crown Princess Mette-Marit walk during a sightseeing tour at the Old Town of Tallinn, Estonia April 26, 2018. REUTERS/Ints Kalnins

Tourists travel on a boat for sightseeing from the Chinese side of the Yalu River close to the shores of North Korea, near Dandong,Liaoning province, China, November 19, 2017. REUTERS/Damir Sagolj

Tourists travel on a boat taking them from the Chinese side of the Yalu River for sightseeing close to the shores of North Korea, near Dandong, Liaoning province, China November 19, 2017. REUTERS/Damir Sagolj

Crabs are offered as a snack to tourists going from the Chinese side of the Yalu River for sightseeing close to the shores of North Korea, near Dandong, China's Liaoning province, November 20, 2017. REUTERS/Damir Sagolj

A couple prepare for a wedding photography session on a boat which takes tourists on sightseeing tours from the Chinese side of the Yalu River, close to the shores of North Korea, near Dandong, Liaoning province, China, November 20, 2017. In the Chinese city of Dandong, signs of neighbouring North Korea are pervasive. REUTERS/Damir Sagolj SEARCH "SAGOLJ ROAD TRIP" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Tourists travel on a boat taking them from the Chinese side of the Yalu River for sightseeing close to the shores of North Korea, near Dandong, Liaoning province, China, November 19, 2017. In the Chinese city of Dandong, signs of neighbouring North Korea are pervasive. REUTERS/Damir Sagolj SEARCH "SAGOLJ ROAD TRIP" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A couple prepare for a wedding photography session on a boat which takes tourists on sightseeing tours from the Chinese side of the Yalu River, close to the shores of North Korea, near Dandong, Liaoning province, China, November 20, 2017. In the Chinese city of Dandong, signs of neighbouring North Korea are pervasive. REUTERS/Damir Sagolj SEARCH "SAGOLJ ROAD TRIP" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Tourists travel on a boat taking them from the Chinese side of the Yalu River for sightseeing close to the shores of North Korea, near Dandong, Liaoning province, China, November 19, 2017. In the Chinese city of Dandong, signs of neighbouring North Korea are pervasive. REUTERS/Damir Sagolj SEARCH "SAGOLJ ROAD TRIP" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.