Xstrata Treetop Walkway, Royal Botanic Gardens, UNESCO World Heritage Site, Kew, London, England, United Kingdom, Europe

Mountain peaks landscape at Coll de Rates, looking east, Tarbena, Marina Alta, Alicante province, Spain, Europe

Walkway over lava field, Timanfaya Volcano Interpretation and Visitors' Centre, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Sunny landscape of a grassy hill with rocky outcrop under a blue sky with clouds, North Yorkshire, England, United Kingdom, Europe

Alpine wildflower meadows along the Ptarmigan Cirque Trail in summer, Kananaskis Country, Alberta, Canadian Rockies, Canada, North America

Mountains near Gjirokaster, Albania, Europe

Brecon Beacons in winter, South Wales, United Kingdom, Europe

View of woodland and Chrysi Ammoudia in background, Thassos, Aegean Sea, Greek Islands, Greece, Europe

Looking towards Siviez, Valais, Switzerland, Europe

Snowy rugged summits on the Langtang trek in Kyanjin Gompa, Himalayas, Nepal, Asia

Aerial of an old watchtower in the Herault gorge, UNESCO World Heritage Site, Causses and Cevennes, Herault, Occitanie, France, Europe

Museum in the Chauvet-Pont-d'Arc Cave, UNESCO World Heritage Site, Ardeche, Auvergne-Rhone-Alpes, France, Europe

Mountains around Pico do Arieiro peak, Santana, Madeira, Portugal, Atlantic, Europe

Beautiful landscape along the Langtang Valley trek, Himalayas, Nepal, Asia

Eggjarnar coast in Suouroy island, Faroe Islands, Denmark, North Atlantic, Europe

Aerial of Tierra del Fuego National Park, Ushuaia, Argentina, South America

Dried bare trees along trail to Pico Ruivo, Santana, Madeira, Portugal, Atlantic, Europe

Aerial view of trees in landscape

A young man in a red shirt poses for a selfie on a rock outcrop high above a deep blue lake surrounded by mountains, Crater Lake, Oregon, USA

A man jumping on skis above Lake Tahoe in California.

Male Bluegill Triggerfish (Xanthichthys auromarginatus) with an erect spinous dorsal fin photographed under water off Maui, Hawaii, USA. He was circling above his prepared spawning area suggesting that this is a courtship display; Maui, Hawaii, United States of America

Pearly Soldierfish (Myripristis kuntee) schooling near a reef just offshore of Maui; Hawaii, United States of America

Portrait of a male Yellowtail Coris (Coris gaimard) taken while scuba diving the Kona coast; Big Island of Hawaii, Hawaii, United States of America

This Yellowtail Coris (Coris gaimard) male turned towards me while scuba diving at Maui; Molokini Crater, Maui, Hawaii, United States of America

Surrounded by patches of Rice Coral (Montipora capitata), a Red Slate Pencil Urchin (Heterocentrotus mamillatus) and a Needle-spined (Urchin Echinostrephus aciculatus) rest on Molokini Backwall which is located offshore of Maui, Hawaii, USA; Molokini Crater, Maui, Hawaii, United States of America

A Red Slate Pencil Urchin (Heterocentrotus mamillatus) rests on Molokini Backwall which is located offshore of Maui; Hawaii, United States of America

Hawaii, Maui, Haleakala National Park, Haleakala Crater.

Hawaii, Maui, Haleakala National Park, Young silversword plant.

Hawaii, Maui, Haleakala National Park, Young silversword plant.

Hawaii, Maui, Haleakala National Park, Haleakala Crater.

California, Yosemite National Park, Ground fog and pine trees in Yosemite Valley.