Gavin Hellier / Infinity pool at luxury resort along the South Coast, Bermuda, 2007. No release available.

Gavin Hellier / Infinity pool at luxury resort along the South Coast, Bermuda, 2007. No release available.

Steven David Miller / Infinity pool overlooking Lake Argyle. The Kimberley, Western Australia. 2017.

David Fleetham / A woman lies at the edge of an infinity pool with a tropical background. Curacao, Netherlands Antilles, Caribbean, May.

Graham Eaton / Grey heron (Ardea cinerea) standing at rim of infinity pool, Maldives, Indian Ocean, January 2017.

Gavin Hellier / Infinity pool at luxury resort along the South Coast, Bermuda, 2007

Gavin Hellier / Infinity pool at luxury resort along the South Coast, Bermuda, 2007

Sue Flood / Infinity edge swimming pool looking over sea, Jade Mountain hotel, St Lucia, May 2007

Sue Flood / Infinity edge swimming pool with tourist's legs, Jade Mountain hotel, St Lucia, May 2007

Onne van der Wal / Clouds in the sky reflecting off the still waters of an infinity pool, St. Barthelemy, Caribbean.

Onne van der Wal / Clouds in the sky reflect off the still waters of an infinity pool overlooking the harbour in Gustavia, St. Barthelemy, Caribbean.

Sue Flood / Infinity edge swimming pool looking over the sea, Jade Mountain hotel, St Lucia, May 2007