Poulnabrone dolmen megalithic tomb, Burren, County Clare, Munster, Republic of Ireland (Eire), EuropeThe Burren (from Irish: Boireann, meaning - great rock) is a unique karst landscape in northwest County Clare, Ireland. The limestone area measures 300 square kilometres and is roughly enclosed within the circle comprised by the villages Ballyvaughan, Kinvarra, Gort, Corrofin, Kilfenora, Lisdoonvarna and the Black Head lighthouse. The definitive article (ie "The" Burren) has only been added to the name by academics in the last few decades as it has always been traditionally called Boireann or Boirinn in Irish and Burren in English.

Pillar Latomie of Paradise, Neapolis Archaeological Park, UNESCO World Heritage Site, Syracuse, Sicily, Italy, Mediterranean, Europe

Katskhi Pillar, natural limestone monolith known as the Pillar of Life, Katskhi, Imereti Region, Georgia, Central Asia, Asia

Hercules Club (Maczuga Herkulesa), a limestone pillar, Ojcow National Park, Malopolska, Poland, Europe

Santa Maria da Vitoria Monastery, UNESCO World Heritage Site, Batalha, Portugal, Europe

The Temple of Leto at the Lycian site of Letoon, UNESCO World Heritage Site, Antalya Province, Anatolia, Turkey, Asia Minor, Eurasia

The Temple of Leto at the Lycian site of Letoon, UNESCO World Heritage Site, Antalya Province, Anatolia, Turkey, Asia Minor, Eurasia

Katskhi Pillar at sunrise, Georgia, Central Asia, Asia

Katskhi Pillar, Georgia, Central Asia, Asia

Katskhi Pillar at sunrise, Georgia, Central Asia, Asia

White limestone cliffs Pillar of Hercules washed by Caribbean Sea, aerial view by drone, English Harbour, Antigua, Leeward Islands, West Indies, Caribbean, Central America

Aerial panoramic by drone of Galleon Beach and Pillar of Hercules limestone cliffs, Antigua, Antigua and Barbuda, Leeward Islands, West Indies, Caribbean, Central America

White limestone cliffs Pillar of Hercules washed by Caribbean Sea, aerial view by drone, English Harbour, Antigua, Leeward Islands, West Indies, Caribbean, Central America

The Temple of Leto at the Lycian site of Letoon, UNESCO World Heritage Site, Antalya Province, Anatolia, Turkey, Asia Minor, Eurasia

The Temple of Leto at the Lycian site of Letoon, UNESCO World Heritage Site, Antalya Province, Anatolia, Turkey, Asia Minor, Eurasia

TheTemple of Leto at the Lycian site of Letoon, UNESCO World Heritage Site, Antalya Province, Anatolia, Turkey, Asia Minor, Eurasia

Pinnacles desert limestone pillars, Nambung National Park, Western Australia, Australia, Pacific

The Lycian site of Letoon, UNESCO World Heritage Site, Antalya Province, Anatolia, Turkey, Asia Minor, Eurasia

Limestone pillars in the Pinnacles Desert, Nambung National Park, Western Australia, Australia, Pacific

Limestone pillars in the Pinnacles Desert, Nambung National Park, Western Australia, Australia, Pacific

Buelna beach and karst limestone El Picon rock pillar at high tide on a windy day, near Llanes, Asturias, Spain, Europe

The Da Gama padrao, a monument to Vasco Da Gama in the Cape Point Nature Reserve in South Africa. Da Gama was a Portuguese sailor/explorer and led expeditions from the Cape to the East in 1497. A padrao is a limestone pillar bearing the Portuguese coat of arms and an inscription stating when and by whom it was raised. The cross signified Portuguese sovereignty and Christianity.

Syria, Limestone Region West Of Aleppo, Village Of Saint Simeon, The Basilica Founded After The Monk Simeon (390-459 Ad) Used To Live On Top Of A Pillar For 37 Years

San Gabriel Limestone Cave, Los Haitises National Park, Dominican Republic, West Indies, Central America

The old kings palace, now a hotel, in the Bussaco Forest reserve in Portugal, Europe

The old kings palace, now a hotel, in the Bussaco Forest reserve in Portugal, Europe

Detail of a historical building in the town of Oamaru, South Island, New Zealand, Oceania

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

A hoodoo, rock formation, in warm evening light, in the Rimrocks area, Toadstool Valley, in southern Utah, USA

Pinnacle limestone formations, Nambung National Park, Western Australia, Australia

El Tormo Alto rock formation at the Enchanted City, La Ciudad Encantada, Cuenca province, Castilla-La Mancha, Spain, Europe

The Pinnacles, smallish desert with limestone formations, Nambung National Park, Western Australia, Australia

Silhouettes of the hoodoos, rock formations, of the Rimrocks area, Toadstool Valley, at sunrise, in southern Utah, USA

Pinnacles, limestone formations, sunset, Nambung National Park, Western Australia

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

Pinnacle sandstone formations, Nambung National Park, Western Australia, Australia

Pinnacle sandstone formations, Nambung National Park, Western Australia, Australia

Chiostro Maggiore di San Francesco, cloister of the church St Francis, built in 1565 - 1623 in travertine, Ascoli Piceno, Marches, Italy, Europe

Pinnacles, limestone formations, Nambung National Park, Western Australia

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

Chiostro Maggiore di San Francesco, cloister of the church St Francis, built in 1565 - 1623 in travertine, with a well in its center, Ascoli Piceno, Marches, Italy, Europe

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

Pinnacle sandstone formations, Nambung National Park, Western Australia, Australia

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

Rock formations and hoodoos in the evening, Bryce Canyon National Park, Sunset Point, Utah, USA, America

The facade of a typical limestone building with columns, in downtown Oamaru, South Island, New Zealand

Twelve Apostles, Australia