Blue Dragon Lava Flow, Craters of the Moon National Monument, Idaho (© Alan Majchrowicz/Getty Images)

Brittlebushes blooming in springtime, Sonoran Desert, Arizona (© Charles Harker/Getty Images)

The ruins of an ancient monastery on the island of Skellig Michael, Ireland (© MNStudio/Getty Images)

Kalaloch Tree of Life, Kalaloch Beach, Olympic National Park, Washington (© Abbie Warnock-Matthews/Shutterstock)

The Roaches, Peak District, England (© George W Johnson/Getty Images)

A duckling swimming in a water meadow, Suffolk, England (© Nick Hurst/Getty Images)

View of Château d'If in the port of Marseille, France (© Sergii Figurnyi/Alamy)

Misool, Raja Ampat Islands, Indonesia (© Giordano Cipriani/Getty Images)

Blue whale skeleton named Hope, Natural History Museum, London, England (© Bailey-Cooper Photography/Alamy)

Village of Vernazza, Cinque Terre, Liguria, Italy (© Roberto Moiola/Sysaworld/Getty Images)

Parliament Hill in Ottawa, Ontario, Canada (© f11photo/iStock/Getty Images)

Cameron Highlands tea plantation, Malaysia (© alex cheong/Getty Images)

Tasmanian snow gum, Mount Field National Park, Tasmania, Australia (© Ignacio Palacios/Getty Images)

Indian star tortoise, Sri Lanka (© Robin Chittenden/Minden Pictures)

Añisclo gorge, Ordesa y Monte Perdido National Park, Huesca, Spain (© Marisa Estivill/Shutterstock)

Aït Benhaddou, Morocco (© Grant Faint/Getty Images)

Mingan Archipelago National Park Reserve, Quebec, Canada (© Instants/E+/Getty Images)

Roussanou Monastery, Meteora, Thessaly, Greece (© Marius Roman/Getty Images)

Adolescent European otters, Loch Spelve, Isle of Mull, Scotland (© Neil Henderson/Alamy)

A stand of slash pines and sawgrass prairie, Everglades National Park, Florida (© Jonathan Gewirtz/Tandem Stills + Motion)

Gunnerside, Swaledale, Yorkshire Dales National Park, England (© Derek Croucher/Alamy)