Stack Rocks, Castlemartin, Pembrokeshire Coast, Wales, United Kingdom, Europe

The Great Sphinx of Giza, a limestone statue of a reclining sphinx, UNESCO World Heritage Site, Giza Plateau, West Bank of the Nile, Cairo, Egypt, North Africa, Africa

The Burren famous glaciated karst pavement landscape of limestone and dry stone walls, County Clare, West of Ireland

Limestone pavement glaciated karst landscape and native flora in The Burren, County Clare, West of Ireland

Limestone pavement glaciated karst landscape in The Burren, County Clare, West of Ireland

Poulnabrone Portal Dolmen megalythic burial tomb, 3800BC, in The Burren glaciated landscape, County Clare, Ireland

Limestone pavement glaciated karst landscape in The Burren, County Clare, West of Ireland

Wild native flower flora and limestone pavement glaciated karst landscape in The Burren, County Clare, West of Ireland

Limestone plateau at sunset, karstic landscape, Burren region, County Clare, Munster, Republic of Ireland, Europe

Limestone plateau, karstic landscape, Burren region, County Clare, Munster, Republic of Ireland, Europe

Ancient prehistoric stone boulder and bare limestone pavement, The Burren, County Clare, West of Ireland

Bryce canyon in winter, view from sunset point, hoodoos at surise, bryce canyon national park, paunsaugunt plateau, utah, usa

Bryce canyon in winter, view from sunset point, hoodoos at surise, bryce canyon national park, paunsaugunt plateau, utah, usa

Bryce canyon in winter, view from sunset point, hoodoos at surise, bryce canyon national park, paunsaugunt plateau, utah, usa

A mountain hut or refuge overlooking the Tre Cime in The Italian Dolomites, Italy, Europe

View across olive trees to medieval town of Pitigliano situated on a volcanic limestone plateau with Campanile on the right, evening light, Maremma, Tuscany, Italy, Europe

The town on its limestone plateau with tower of the cathedral Santi Pietro e Paolo, Pitigliano, Maremma, Tuscany, Italy, Europe

View to medieval town of Pitigliano situated on a volcanic limestone plateau with Campanile on the left, evening light, Maremma, Tuscany, Italy, Europe

Village of Baume-les-Messieurs, 'Most beautiful village in France', Jura, France

Abbey and village of Baume-les-Messieurs, 'Most beautiful village in France', Jura, France