David Pattyn / Children snorkelling in the sea and swimming with bottlenose dolphins (Tursiops truncatus) with boat approaching. Indian Ocean, Zanzibar, Tanzania, August 2014.

Cheryl-Samantha Owen / West Coast Rock Lobster (Jasus lalandii) observed by diver. Kalk Bay, Atlantic Ocean, False Bay, Valsebaai, Western Cape, South Africa

Nick Turner / Couple with child in seat cycling in the Cotswolds at Guiting Power, Gloucestershire, UK, August 2011. Model released

Nick Turner / Walkers on the South West Coast Path National Trail near Durdle Door, Dorset, UK, May 2009.

Roger Powell / Airboat used by tourists for leisure activities; this type of vessel, because of its shallow draft, can get into areas that other boats can't, however it is extremely noisy and disturbs wildlife, espe...

Ernie Janes / Stile and footpath, Aldbury Nowers Nature Reserve, the Chilterns, Hertfordshire, UK, July

Franco Banfi / Scuba diver exploring volcanic crack Nesgja, in Asbyrgi National Park, northern Iceland

Franco Banfi / Giant manta ray (Manta birostris) with scuba diver below, El Boiler dive place, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Pascal Kobeh / Snorkeler in front of the Arch among the rocky islands, Koror, Palau, Philippine Sea

Franco Banfi / Heli-diving, going into the water for a scouting scuba dive in a mountain lake, Iceland

Merryn Thomas / Men walking on beach at Aberdovey, West Wales, January 2015.

Matthew Maran / Runner on sunlit path in early morning, cose to the Vale of Health Hampstead Heath, London, England, UK. November 2015.