Castellfollit de la Roca, Catalonia, Spain (© Eloi_Omella/Getty Images)

Montmartre and Sacre Cœur, Paris, France (© Tuul & Bruno Morandi/Getty Images)

Young black caiman, Tambopata National Reserve, Peru (© Maxime Aliaga/Minden Pictures)

Palmyra Atoll National Wildlife Refuge, Central Pacific Ocean (© Ian Shive/Tandem Stills + Motion)

Sunrise over Swiftcurrent Lake, Glacier National Park, Montana (© Jason Savage/Tandem Stills + Motion)

Katahdin Woods and Waters National Monument, Penobscot County, Maine (© Cavan Images/Alamy)

Prasat Phanom Rung temple ruins, Buriram province, Thailand (© Banjongseal324/Getty Images)

Ocean City, Maryland, at sunrise (© Kevin Olson/Amazing Aerial Agency)

Nazca boobies, Wolf Island, Galápagos Islands, Ecuador (© Tui De Roy/Minden Pictures)

Sunrise at Grand Teton National Park, Wyoming (© Kurt Budliger/Tandem Stills + Motion)