Alex Mustard / A stand of Pillar coral (Dendrogyra cylindrus) growing on a coral reef, East End, Grand Cayman, Cayman Islands

Inaki Relanzon / Portrait of a young girl wearing traditional make-up, Mandalay, Mandalay Division, Myanmar, Burma. August 2009

Matthew Maran / Tufted grey langur {Semnopithecus priam thersites} group amongst the Pollunaruwa ruins, Sri Lanka

Jack Dykinga / Hoodoo rock pillar and boulder eroded by the weather, Boulder Mountain, Aquarius plateau, Utah, USA

Ian Lockwood / Shola forest at Pillar Rocks shunted montane tropical rainforest, Western Ghats, Palni Hills, Tamil Nadu India

Alex Mustard / View down on a pillar coral (Dendrogyra cylindrus) growing on a coral reef, with blue tangs. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Ingo Arndt / Traditional wooden prayer pillars with flags. Olkhon Island, Buryat Region, Lake Baikal, Siberia, Russia. February 2019.

Chris Mattison / Double pylon supporting Prince of Wales Bridge, suspension bridge carrying M4 motorway across River Severn between Monmouthshire, Wales and Gloucestershire, England, UK. 2018.

Chris Mattison / Double pylon supporting Prince of Wales Bridge, suspension bridge carrying M4 motorway across River Severn between Monmouthshire, Wales and Gloucestershire, England, UK. 2018.

Colin Monteath/ Hedgehog House / Clouds over grassland, Rock and Pillar Range, Otago, New Zealand

Ashley Cooper / Blackfriars Bridge across the River Thames in London, UK, is the world's largest solar bridge. Its parapet contains over 4400 solar photo voltaic panels, generating 50% of the stations electricity nee...

Ashley Cooper / Blackfriars Bridge across the River Thames in London, UK, is the world's largest solar bridge. Its parapet contains over 4400 solar photo voltaic panels, generating 50% of the stations electricity nee...