Aerial of Potter glacier, Tierra del Fuego, Chile, South America

A tour of Long Island Farm outside Stanley in the Falkland Islands, South Atlantic Ocean, South America

A tour of the Long Island sheep farm outside Stanley in the Falkland Islands, South Atlantic Ocean, South America

Tourist photographing a wild Galapagos giant tortoise (Geochelone elephantopus) feeding on the upslope grasslands of Santa Cruz Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Tourist photographing a wild Galapagos giant tortoise (Geochelone elephantopus) feeding on the upslope grasslands of Santa Cruz Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Reflected images of guests from the Lindblad Expedition ship National Geographic Endeavour on Zodiac tour around the Antarctic Peninsula

Aerial view of Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Aerial view of Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

El Castillo, The Pyramid of Kukulkán, is the Most Popular Building in the UNESCO Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico. Asian tour leder dressed in a maya style.

The Church and Nunnery at Chichen Itza Archaeological Site in Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

The Great Ball Court in the Mayan Ruins of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Stony stairs of tomb of the High Priest pyramid at Chichen Itza Archaeological Site in Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

El Castillo, The Pyramid of Kukulkán, is the Most Popular Building in the UNESCO Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

El Castillo, The Pyramid of Kukulkán, is the Most Popular Building in the UNESCO Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Serpent head sculpture in Mayan Ruin of Chichen Itza Archaeological Site in Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

El Castillo, The Pyramid of Kukulkán, is the Most Popular Building in the UNESCO Mayan Ruin of Chichen Itza Archaeological Site Yucatan Peninsula, Quintana Roo, Caribbean Coast, Mexico

Hamilton Island, Whitsunday Islands, Great Barrier Reef, Queensland

Hamilton Island, Whitsunday Islands, Great Barrier Reef, Queensland

Landrover on a dirt road in Tarangire national park, Tanzania

Landrover on a dirt road in Tarangire national park, Tanzania

Aerial view, construction site, bulk ships, unloading of coal, ThyssenKrupp Steel, port Walsum, Duisburg, Ruhrgebiet region, North Rhine-Westphalia, Germany, Europe

View of train tracks leading to Gare Vaugirard, Falguiere and Moulin de la Vierge neighborhoods in Paris seen from Montparnasse Tower, France

Japanese writing on a piece of paper

Couple hugging tree

Couple hugging tree