Jeff Foott / Double Arch seen through Cove Arch, Arches National Park, Utah

Jeff Foott / Double Arch seen through Cove Arch, Arches National Park, Utah

Ross Hoddinott / Durdle Door rock arch at high tide, Nr Lulworh Cove, Dorset, UK. April 2018.

Ross Hoddinott / Durdle Door rock arch in evening light, Lulworth Cove, Dorset, England, UK, September 2015.

Colin Monteath/ Hedgehog House / Iceberg with thin arch at sunset, Cierva Cove, Antarctic Peninsula, Antarctica

Colin Monteath/ Hedgehog House / Iceberg with tunnel at sunset, Cierva Cove, Antarctic Peninsula, Antarctica

Colin Monteath/ Hedgehog House / Kayakers approaching arches in iceberg, Cierva Cove, Antarctic Peninsula, Antarctica

Bryan and Cherry Alexander / Ice arch in iceberg, Cierva Cove, Antarctica, 2009.

David Noton / Sunset at Durdle Door, nr Lulworth Cove, Dorset, England, UK

Colin Varndell / Durdle door, Lulworth Cove Dorset, England

David Noton / Durdle Door rock arch, near Lulworth Cove Dorset, England

David Noton / Looking through rock arch to sunset over sea, Church Cove, the Lizard, Cornwall, UK