The Cathedral of Florence, Italy

Mokoli'I Island in Kaneohe Bay, seen from Kualoa Regional Park, Oahu, Hawaii

A great egret in Everglades National Park, Florida

Saint Nicholas Day in Verbier, Switzerland

Elephants near Mount Kilimanjaro, Amboseli National Park, Kenya

Miami Beach, Florida

Tlikakila River Delta in Lake Clark National Park, Alaska

Paradise Harbour, Antarctica

The Old Town of Rovinj, Croatia

Great blue herons building a nest in Wakodahatchee Wetlands, Delray Beach, Florida

Mars

Cecropia leaf atop lobster claw petals, Mexico

An olive tree in front of the Temple of Concordia on the island of Sicily, Italy

Monks Mound at the Cahokia Mounds UNESCO World Heritage Site near Collinsville, Illinois

Cranberry bog

Sunflower

Red fox in Amsterdamse Waterleidingduinen Nature Reserve, Netherlands

Ahmad Bin Ali Stadium in Doha, Qatar

'World in Progress II,' a land art painting by Saype, United Nations Headquarters, New York City

Virgin River in Zion National Park, Utah