John Shaw / Shoreline of Lake Powell, seen from Alstrom Point on Romana Mesa. Glen Canyon National Recreation Area, on the Arizona/Utah border, USA, January.

Pal Hermansen / Skating area labyrinth surrounded by snow, aerial view. Akershus, Norway. December 2017.

Hiroya Minakuchi / Southern Right Whale (Eubalaena australis) sailing at sunset, Peninsula Valdez, Argentina

Jack Dykinga / Stevens Arch reflected in the amid sand bar ripples Escalante Canyon, Canyon National Recreation Area, Utah, USA

Wim van den Heever / African elephant (Loxodonta africana) grazing in an open field with a full moon rising near Baobab tree (Adansonia digitata). With tourists on safari under the tree. Savuti Marsh, Botswana, May 2014.

Jeff Vanuga / Traffic jam caused by Grizzly bear (Ursus arctos horribilis) mother and cubs crossing road, watched by tourists and photographers, Yellowstone National Park, Wyoming, USA, October 2015.

Inaki Relanzon / Tourists watching and petting African elephant (Loxodonta africana) calf. David Sheldrick African Elephant Orphanage. Nairobi National Park, Nairobi, Kenya.

Colin Monteath/ Hedgehog House / Kayakers paddling back to cruise ship Polar Pioneer, Lemaire Channel, Antarctic Peninsula, Antarctica

Juan Carlos Munoz / Tourist paddling among mangroves in canoe, Puerto Jimenez, Golfo Dulce, Osa Peninsula, Costa Rica.

Juan Carlos Munoz / Tourists looking down onto underground stream, from illuminated pathway, Skocjan Caves, Green Karst, Slovenia, October 2014.

Juan Carlos Munoz / Tourists hiking along dirt track, Triglav National Park, Julian Alps, Slovenia, October 2010.

Andy Rouse / Bengal tiger (Panthera tigris tigris) with tourists watching from cars, Ranthambore, India