Källö-Knippla, an island in the archipelago of Gothenburg, Sweden (© Martin Wahlborg/Getty Images)

Freshwater plants and tetra fish, Aquário Natural, Rio Baía Bonita, Mato Grosso do Sul, Brazil (© Michel Roggo/Minden Pictures)

The Great White Roller Coaster at Wildwood, New Jersey (© John Van Decker/Alamy)

Chittorgarh Fort, India (© Anand Purohit/Getty Images)

Panther chameleon in Amber Mountain National Park, Madagascar (© Christian Ziegler/Minden Pictures)

Boundary Waters Canoe Area Wilderness, Superior National Forest, Minnesota (© Dukas/Universal Images Group via Getty Images)

Herd of African elephants in Amboseli National Park, Kenya (© Susan Portnoy/Shutterstock)

Mount Tsubakuro near Azumino, Nagano, Japan (© Joshua Hawley/Getty Images)

Joshua trees in Joshua Tree National Park, California (© Tim Fitzharris/Minden Pictures)

Cueva de las Manos (Cave of the Hands) in Santa Cruz, Argentina (© Adwo/Alamy)