England, Yorkshire, Yorkshire Dales National Park. The Impressive Natural Rock Formations / Geology of the Limestone Features of Malham Cove in the Yorkshire Dales National Park

England, North Yorkshire, Yorkshire Dales National Park. The distinctive peak of Pen-y-ghent viewed from farmland near the village of Horton in Ribblesdale.

England, North Yorkshire, Yorkshire Dales National Park. A single tree in the limestone pavement known as Twisleton Scars.

England, North Yorkshire, Twistleton Scar. Limestone pavement and Hawthorn Tree at Twistleton Scar in the Yorkshire Dales National Park.

England, North Yorkshire, Yorkshire Dales National Park. A single tree in the limestone pavement known as Twisleton Scars with Ingleborough in the distance.

England, North Yorkshire, Yorkshire Dales National Park. Ribblehead Viaduct, a railway viaduct crossing the valley of the River Ribble at Ribblehead.

England, Northumberland, Caller Crag & Boulders. Late afternoon light illuminates the snow covered features of Caller Crag & Boulders.

Piobull Fhinn Stone Circle, Isle Of North Uist. This image was photographed for the Legacy project, a fascinating not-for-profit endeavour to capture the mystifying stone remains of prehistoric sites scattered across the British Isles. Please visit www.thelegacyproject.org.uk for more information.

Australia, Victoria, The Twelve Apostles. The world famous Twelve Apostles limestone stacks located along the Great Ocean Road in Port Campbell National Park.

New Zealand, Marlborough, Kaikoura. Coastal limestone outcrops on the Kaikoura Pennisula near the town of Kaikoura.

United States of America, Arizona, Monument Valley Tribal Park. The iconic landscape of the sandstone buttes of the Monument Valley Tribal Park located in the Navajo Nation straddling the Arizona / Utah border.