Japanese tourist Jesse Katayama (R) holds a Peruvian flag while attending a small ceremony with Peruvian authorities, after becoming the first tourist to visit the Inca citadel during the coronavirus disease (COVID-19) pandemic, in Machu Picchu, Peru October 13, 2020. Municipality of Machupicchu/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY

Japanese tourist Jesse Katayama (L) poses for a photograph with Oscar Valencia, head of tourism of the Machu Picchu municipality, during his visit to the ruins of Machu Picchu, Peru October 10, 2020. Picture taken October 10, 2020. Municipality of Machupicchu/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY

Japanese tourist Jesse Katayama (C) attends a small ceremony with Mayor of the Machupicchu district Darwin Baca (L) and Regional Governor of Cusco Jean Paul Benavente, after becoming the first tourist to visit the Inca citadel during the coronavirus disease (COVID-19) pandemic, in Machu Picchu, Peru October 13, 2020. Municipality of Machu Picchu/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY

PERU-MACHUPICCHU/ - Map, photo and timeline detailing the discovery to the wider world of Peru's Machu Picchu citadel 100 years ago. RNGS. (SIN05)

PERU-MACHUPICCHU/ - Map, photo and timeline detailing the discovery to the wider world of Peru's Machu Picchu citadel 100 years ago. RNGS. (SIN05)

PERU-MACHUPICCHU/ - Photograph of the Inca citadel of Machu Picchu with timeline of events concerning the removal of artifacts held by Yale University. The first of some 46,000 objects have been returned to Peru. RNGS. (SIN08)

PERU-MACHUPICCHU/ - Photograph of the Inca citadel of Machu Picchu with timeline of events concerning the removal of artifacts held by Yale University. The first of some 46,000 objects have been returned to Peru. RNGS. (SIN08)

Workers carry a box containing archaeological pieces from Machu Picchu, at the government palace in Lima March 30, 2011. The first shipment of artefacts from the famed Inca ruin Machu Picchu were returned to Peru on Wednesday, almost 100 years after being taken to Yale University, symbolically ending a bitter dispute. Peru's President Alan Garcia, who led a loud campaign to get back the collection of 46,000 pieces of ceramics, jewelry and bones, received a batch of returning relics at the presidential palace in Lima. REUTERS/Pilar Olivares (PERU - Tags: POLITICS)

Peru's President Alan Garcia (4th L) waves, as workers carry a box containing archaeological pieces from Machu Picchu, at the government palace in Lima March 30, 2011. The first shipment of artefacts from the famed Inca ruin Machu Picchu were returned to Peru on Wednesday, almost 100 years after being taken to Yale University, symbolically ending a bitter dispute. Garcia, who led a loud campaign to get back the collection of 46,000 pieces of ceramics, jewelry and bones, received a batch of returning relics at the presidential palace in Lima. REUTERS/Pilar Olivares (PERU - Tags: POLITICS)

Trucks containing archaeological pieces from Machu Picchu, arrive at the government palace in Lima March 30, 2011. The first shipment of artefacts from the famed Inca ruin Machu Picchu were returned to Peru on Wednesday, almost 100 years after being taken to Yale University, symbolically ending a bitter dispute. Peru's President Alan Garcia, who led a loud campaign to get back the collection of 46,000 pieces of ceramics, jewelry and bones, received a batch of returning relics at the presidential palace in Lima. REUTERS/Pilar Olivares (PERU - Tags: POLITICS)

Peru's President Alan Garcia speaks to the media, next to a box containing archaeological pieces from Machu Picchu, at the government palace in Lima March 30, 2011. The first shipment of artefacts from the famed Inca ruin Machu Picchu were returned to Peru on Wednesday, almost 100 years after being taken to Yale University, symbolically ending a bitter dispute. Garcia, who led a loud campaign to get back the collection of 46,000 pieces of ceramics, jewelry and bones, received a batch of returning relics at the presidential palace in Lima. REUTERS/Pilar Olivares (PERU - Tags: POLITICS)

Windows of Machu Picchu citadel are seen in Cuzco November 3, 2010. Peru said on Friday that Yale University has agreed to return thousands of artifacts taken from the the Machu Picchu archeological site in the early 1900s, and the pact could end a bitter controversy.
Picture taken November 3, 2010.
REUTERS/Pilar Olivares (PERU - Tags: POLITICS SOCIETY)

A view shows part of the Inca citadel of Machu Picchu in Cuzco November 3, 2010. Peru said on Friday that Yale University has agreed to return thousands of artifacts taken from the the Machu Picchu archeological site in the early 1900s, and the pact could end a bitter controversy. Picture taken November 3, 2010. REUTERS/Pilar Olivares (PERU - Tags: POLITICS SOCIETY)

A aerial view shows the Inca citadel of Machu Picchu in Cuzco November 3, 2010. Peru said on Friday that Yale University has agreed to return thousands of artifacts taken from the Machu Picchu archeological site in the Andes in the early 1900s, and the pact could end a bitter controversy. Picture taken November 3, 2010. REUTERS/Pilar Olivares (PERU - Tags: POLITICS SOCIETY)

A view of the Inca citadel of Machu Picchu in Cuzco in this November, 2003 file photo. Peru plans to sue Yale University for the return of 4,900 artifacts taken from Machu Picchu, the fabled Inca citadel, by a U.S. explorer nearly a century ago, the government said on November 1, 2005. Picture taken November, 2003. REUTERS/Pilar Olivares

High amid the towering peaks of the Andes mountains, the grating shriek
of pneumatic drills fill the air. New streets are being laid out, while
hotels are going up fast in the dormitory town of Machu Picchu Pueblo,
the starting point for the 450,000 tourists who every year flock to
Peru's most famous Inca site, the mystic citadel of Machu Picchu.
Peruvian President Alejandro Toledo (L) and U.N. Secretary-General Kofi
Annan pose for media during their visit to Machu Picchu in Cuzco,
November 12, 2003. REUTERS/Pilar Olivares LIFESTYLE-PERU-MACHUPICCHU

PO/HB

Foreign tourists take photos of a mountain llama with the peak of
Huayna Picchu looming in the backdround, at Peru's Inca citadel of
Machu Picchu near Cuzco, November 11, 2003. Unbridled growth in tourism
is irrevocably damaging the United Nations World Heritage Site and its
surrounding attractions, destroying one of the world's premier
archeological sites, some planners say. The United Nations Educational,
Scientific and Cultural Organization (UNESCO) says it may place Machu
Picchu on its list of endangered sites, a "moral sanction" against the
Peruvian government's handling of the monuments. NO RIGHTS CLEARANCES OR PERMISSIONS ARE REQUIRED FOR THIS IMAGE REUTERS/Pilar
Olivares/FEATURE/PERU-MACHUPICCHU
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A construction worker helps build a new street in the Peruvian tourist
town of Machu Picchu Pueblo near Cuzco, on November 11, 2003. Unbridled
growth in tourism is irrevocably damaging the United Nations World
Heritage Site and its surrounding attractions, destroying one of the
world's premier archeological sites, some planners say. The United
Nations Educational, Scientific and Cultural Organization (UNESCO) says
it may place Machu Picchu on its list of endangered sites, a "moral
sanction" against the Peruvian government's handling of the monuments.
REUTERS/Pilar Olivares/FEATURE/PERU-MACHUPICCHU

PO/GN

Tourists walk up and down the ancient stone staircases at Peru's mystic
Inca citadel, Machu Picchu near Cuzco, on November 11, 2003. Unbridled
growth in tourism is irrevocably damaging the United Nations World
Heritage Site and its surrounding attractions, destroying one of the
world's premier archeological sites, some planners say. The United
Nations Educational, Scientific and Cultural Organization (UNESCO) says
it may place Machu Picchu on its list of endangered sites, a "moral
sanction" against the Peruvian government's handling of the monuments.
REUTERS/Pilar Olivares/FEATURE/PERU-MACHUPICCHU

PO/GN

A group of tourists takes in the sights of Peru's most famous
archeological site, the mystic Inca citadel of Machu Picchu, near
Cuzco, on November 11, 2003. In the background is the peak of Huayna
Picchu. Unbridled growth in tourism is irrevocably damaging the United
Nations World Heritage Site and its surrounding attractions, destroying
one of the world's premier archeological sites, some planners say. The
United Nations Educational, Scientific and Cultural Organization
(UNESCO) says it may place Machu Picchu on its list of endangered
sites, a "moral sanction" against the Peruvian government's handling of
the monuments. REUTERS/Pilar Olivares/FEATURE/PERU-MACHUPICCHU

PO/GN

Hundreds of tourists climb up and around Peru's mystic Inca citadel of
Machu Picchu, near Cuzco, on November 11, 2003. Unbridled growth in
tourism is irrevocably damaging the United Nations World Heritage Site
and its surrounding attractions, destroying one of the world's premier
archeological sites, some planners say. The United Nations Educational,
Scientific and Cultural Organization (UNESCO) says it may place Machu
Picchu on its list of endangered sites, a "moral sanction" against the
Peruvian government's handling of the monuments. REUTERS/Pilar
Olivares/FEATURE/PERU-MACHUPICCHU

PO/GN

A group of tourists observes the peak of Huayna Picchu, one of Peru's
most famous views, from atop the mystic Inca citadel of Machu Picchu in
Cuzco, on November 11, 2003. Unbridled growth in tourism is irrevocably
damaging the United Nations World Heritage Site and its surrounding
attractions, destroying one of the world's premier archeological sites,
some planners say. The United Nations Educational, Scientific and
Cultural Organization (UNESCO) says it may place Machu Picchu on its
list of endangered sites, a "moral sanction" against the Peruvian
government's handling of the monuments. NO RIGHTS CLEARANCES OR PERMISSIONS ARE REQUIRED FOR THIS IMAGE REUTERS/Pilar
Olivares/FEATURE/PERU-MACHUPICCHU
PO/GN