Guy Edwardes / Milky Way above Durdle Door rock arch. Jurasic Coast, Dorset, England, UK. August 2019. Composite image.

Gary Bell/ Oceanwide / Coastal rock arch at sunset, Bermagui, New South Wales, Australia

Jeff Foott / Tower Arch, Arches National Park, Utah

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

Jeff Foott / Turret Arch in winter, La Sal Mountains, Arches National Park, Utah

Jeff Foott / Double O Arch, Arches National Park, Utah

Jeff Foott / Turret Arch and the Milky Way, Arches National Park, Utah

Jeff Foott / Skyline Arch, Arches National Park, Utah

Jeff Foott / Delicate Arch and the La Sal Mountains, Arches National Park, Utah

Tim Fitzharris / Rock arch, Atuh Beach, Nusa Penida, Bali, Indonesia

Guy Edwardes / Gatklettur, Arnarstapi, Snaefellsnes Peninsula, Iceland, March 2017.

Guy Edwardes / Durdle Door at sunrise, Jurassic Coast, Dorset, England, UK. December 2014.

Guy Edwardes / Durdle Door by moonlight, Jurassic Coast, Dorset, England, UK. December 2014.

Guy Edwardes / Yesnaby Stack, Orkney, Orkney Islands, Scotland, UK. August 2014.

Guy Edwardes / Yesnaby Stack, Orkney, Orkney Islands, Scotland, UK. August 2014.

Guy Edwardes / Yesnaby Stack, Orkney, Orkney Islands, Scotland, UK. August 2014.

Guy Edwardes / Durdle Door, Dungy Head and Bats Head at sunset, Isle of Portland on horizon, Jurassic Coast, Dorset, England, UK. December 2014.

Guy Edwardes / Durdle Door and Bats Head at sunset, Jurassic Coast, Dorset, England, UK. December 2014.

Guy Edwardes / Stac a' Phris rock arch, Isle of Lewis, Outer Hebrides, Scotland, UK. March 2017.

Guy Edwardes / Natural Arch, Siabost, Isle of Lewis, Outer Hebrides, Scotland, UK. March, 2015.

Guy Edwardes / Gaada Stack, Foula, Shetland, Scotland, UK. August, 2016.

Guy Edwardes / Gaada Stack, Foula, Shetland, Scotland, UK. August, 2016.

Guy Edwardes / Gaada Stack, Foula, Shetland, Scotland, UK. August.

Guy Edwardes / Seaweed covered rocks with Gaada Stack in background, Foula, Shetland, Scotland, UK. August, 2016.

Guy Edwardes / Gaada Stack, Foula, Shetland, Scotland, UK. August, 2016.

Guy Edwardes / Gaada Stack, Foula, Shetland, Scotland, UK. August, 2014.

Ross Hoddinott / Enys Dodnan Arch, the Armed Knight rock and Longships lighthouse, Land's End, Cornwall, UK. October 2016.

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

SCOTLAND: The Big Picture / Rock archway at sunset, Isle of Lewis, Outer Hebrides, Scotland, UK, September 2014.

Jeff Foott / Milky way over arch, Turret Arch, Arches National Park, Utah

Steve O. Taylor (GHF) / Rock arch in the far north of Niger, 2005.

Hougaard Malan / Sunny summer day at Hole in the Wall. Wild Coast, Eastern Cape, South Africa. May 2013. Non-ex.

Hougaard Malan / Cathedral rock at sunrise. Pondoland, Eastern Cape, South Africa. June 2012.

Hougaard Malan / Flowering aloes with cathedral rock beyond. Pondoland, Eastern Cape, South Africa. June 2012.

Tim Fitzharris / El Arco, Cabo San Lucas, Baja California Mexico

Benjamin Barthelemy,Benjamin Barthelemy / Landscape view of the Manneporte, a natural rock arch and needle, Etretat, Normandy, France, June

Sue Daly,Sue Daly / Northern Arch, Poor Knights Islands Nature Reserve, North Island, New Zealand, January 2013

Jack Dykinga / Star trails in sky over Alabama Hills, BLM eroded granite formation know as Mobius Arch. Eastern Sierra, California. May 2012.

Inaki Relanzon / Aerial view of Dyrholaey and Reynisdrangar, near Vik, in South Iceland, April 2010

Thomas Lazar / Ice hanging from arch in sea cave carved in soft sandstone cliffs, frozen lake, Squaw Bay, Lake Superior, Apostle Islands National Lakeshore, Wisconsin, USA, February 2009

Angelo Gandolfi / Egyptian vulture (Neophron percnopterus) in flight, with natural rock arch in the background. Canyon del Ebro and Rudron, Castilla y Leon, Spain.

Wild Wonders of Europe / Relanzón / Arch stone in "Los hervideros", South West Lanzarote, Canary Islands, Spain, March 2009 WWE BOOK PLATE.

Wild Wonders of Europe / Zankl / Rock formations / Azur Window at Blue Hole, Dwejra, Gozo, Malta, May 2009

Wild Wonders of Europe / Popp-Ha / Sea over smooth rocks with rock arch in distance, Gaztelugatxe coast, Basque country, Bay of Biscay, Spain, October 2008

Wild Wonders of Europe / Biancarelli / Karstic rock arch in the Korana canjon, Plitvice Lakes National Park, Croatia, October 2008

Jouan & Rius / View of coast through rock arch, Papa Stour island, Shetland Islands, Scotland, UK

Jack Dykinga / A river flowing through a rock arch formed by giant Navajo Sandstone rockslide in the Vermilion Cliffs National Monument, Arizona

Shattil & Rozinski / Rock arch viewed through fog in winter, Arches National Park, Utah, USA, 1992

Tim Fitzharris / Turret arch through north window arch, Arches National Park, Utah

David Welling / Rock arch in Colorado plateau. Arches NP, Utah, Turret Arch

Gary Bell/ Oceanwide / Rock arch, Tasmans Arch, Tasman National Park, Tasmania, Australia

Gary Bell/ Oceanwide / Rock arch, London Bridge, Port Campbell National Park, Victoria, Australia

Gary Bell/ Oceanwide / Rock arch, London Bridge, Port Campbell National Park, Victoria, Australia

Graham Eaton / The Green Bridge of Wales, a natural rock arch comprising Carboniferous limestone, Castlemartin, Pembrokeshire, Wales. September 2017.

Graham Eaton / The Green Bridge of Wales, a natural rock arch comprising Carboniferous limestone, Castlemartin, Pembrokeshire, Wales. September 2017.

Jeff Foott / Trail to Turret Arch, Arches National Park, Utah

Jeff Foott / Tower Arch, Arches National Park, Utah

Jeff Foott / Delicate Arch, Arches National Park, Utah

Jeff Foott / Delicate Arch in winter, Arches National Park, Utah

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

Jeff Foott / Delicate Arch, Arches National Park, Utah

Jeff Foott / Skyline Arch, Arches National Park, Utah

Jeff Foott / Landscape Arch, Arches National Park, Utah

Jeff Foott / Turret Arch in winter, La Sal Mountains, Arches National Park, Utah

Jeff Foott / North Window arch in winter, Arches National Park, Utah

Jeff Foott / North Window and South Window arches in winter, Arches National Park, Utah

Jeff Foott / Western Juniper (Juniperus occidentalis) tree winter and Delicate Arch, Arches National Park, Utah

Jeff Foott / #NAME?

Jeff Foott / Delicate Arch in winter, Arches National Park, Utah

Jeff Foott / Delicate Arch in winter, Arches National Park, Utah

Jeff Foott / Tourists and Delicate Arch, Arches National Park, Utah

Jeff Foott / Tourists at Delicate Arch, Arches National Park, Utah

Jeff Foott / La Sal Mountiains through Delicate Arch, Arches National Park, Utah

Jeff Foott / Delicate Arch, Arches National Park, Utah

Jeff Foott / Full moon through Skyline Arch, Arches National Park, Utah

Jeff Foott / Delicate Arch at sunrise, Arches National Park, Utah

Jeff Foott / Delicate Arch at sunrise, Arches National Park, Utah

Jeff Foott / Turret Arch and North Window Arch, Arches National Park, Utah

Jeff Foott / Full moon and Turret Arch, Windows Section, Arches National Park, Utah

Jeff Foott / Double Arch,a pothole arch, Arches National Park, Utah

Jeff Foott / Rock arch, Double O Arch, Arches National Park, Utah

Ernie Janes / Durdle Door natural limestone arch on the Jurassic Coast near Lulworth, Dorset, England, UK, June.

Tim Fitzharris / Rock arch, Atuh Beach, Nusa Penida, Bali, Indonesia

Tim Fitzharris / Rock arch, Atuh Beach, Nusa Penida, Bali, Indonesia

Tim Fitzharris / Rock arch, Atuh Beach, Nusa Penida, Bali, Indonesia

Tim Fitzharris / Rock arch, Atuh Beach, Nusa Penida, Bali, Indonesia

Jeff Foott / Rock formation, Metate Arch, Devil's Garden, Grand Staircase-Escalante National Monument, Utah

SCOTLAND: The Big Picture / Stac a Phris sea arch with crashing waves on the west coat of the isle of Lewis, Outer hebrides, scotland, uk

Ross Hoddinott / Stac a' Phris rock arch at high tide, sunset, The Isle of Lewis and Harris, Outer Hebrides, Scotland, UK. October 2018.

Ross Hoddinott / Stac a' Phris rock arch at high tide, sunset, The Isle of Lewis and Harris, Outer Hebrides, Scotland, UK. October 2018.

Chase Dekker / Stars above arches, Windows Section, Arches National Park, Utah

Chase Dekker / Rock arch at sunset, Delicate Arch, Arches National Park, Utah

Chase Dekker / Mesa Arch, Canyonlands National Park, Utah

Chase Dekker / Mesa Arch at sunrise, Canyonlands National Park, Utah

Chase Dekker / Stars above Double Arch, Arches National Park, Utah

Chase Dekker / Hiker at Delicate Arch in winter, Arches National Park, Utah