Birch trees (Betula aetnensis) sprouting, Etna, Sicily, Italy, Mediterranean, Europe

The Global Seed Vault just outside the town of Longyearbyen on the island of Spitsbergen in Svalbard, Norway, Arctic, Europe

The endemic Opuntia cactus (Opuntia echios) cactus growing in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Aromatic salvia marina, Punta El Holondes, Guanahacabibes Peninsula National Park and Biosphere Reserve, Pinar del Rio, Cuba, West Indies, Caribbean, Central America

View of tropical flora in Giardini la Mortella Botanical Gardens, Forio, Island of Ischia, Campania, Italy, Europe

View of tropical flora in Giardini la Mortella Botanical Gardens, Forio, Island of Ischia, Campania, Italy, Europe

King Leopold sandstone formation known as Thor's Hammer, Hunter River, Frederick Harbor, Kimberley, Western Australia, Australia, Pacific

Alpine wildflower meadows with fireweed (Chamaenerion angustifolium) along the Ptarmigan Cirque Trail in summer, Kananaskis Country, Alberta, Canadian Rockies, Canada, North America

View of tearoom in Giardini la Mortella Botanical Garden, Forio, Island of Ischia, Campania, Italy, Europe

View of summer flowers and waterfront architecture, Aker Brygge, Oslo, Norway, Scandinavia, Europe

A view of Tarr Inlet in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Botanical garden Jardin Canario Viera y Clavijo, near Las Palmas de Gran Canaria, Gran Canaria, Canary Islands, Spain, Atlantic, Europe

Military helicopter hovers in clearing in Ulu Temburong National Park, Brunei

Military helicopter hovers in clearing in Ulu Temburong National Park, Brunei