Miami Beach, Florida (© Matteo Colombo/Getty Images)

Tlikakila River Delta in Lake Clark National Park, Alaska (© Dawn Wilson Photography/Getty Images)

Paradise Harbour, Antarctica (© SinghaphanAllB/Getty Images)

The Old Town of Rovinj, Croatia (© trabantos/Shutterstock)

Great blue herons building a nest in Wakodahatchee Wetlands, Delray Beach, Florida (© Imagebroker/Alamy)

Mars (© NASA/Alamy)

Cecropia leaf atop lobster claw petals, Mexico (© Gerry Ellis/Minden Pictures)

An olive tree in front of the Temple of Concordia on the island of Sicily, Italy (© Alfio Finocchiaro/Shutterstock)

Monks Mound at the Cahokia Mounds UNESCO World Heritage Site near Collinsville, Illinois (© Matthew Gush/Alamy)

Cranberry bog (© SHSPhotography/Getty Images)