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.

Tombs of Ataxerxes I and Darius the Great, Naqsh-e Rostam Necropolis, near Persepolis, Iran, Middle East

The Ossuary building, Tomb of the Great Priest, Mayan ruins, Chichen Itza, UNESCO World Heritage Site, Yucatan, Mexico, North America

Tomb of Cyrus the Great, 576-530 BC, Pasargadae, UNESCO World Heritage Site, Iran, Middle East

Serpent's Head at bottom of Great Pyramid, Chichen Itza, Mayan site, Mexico, Central America

The Great Papyrus Columns, Hypostyle, Karnak Temple Complex, UNESCO World Heritage Site, Luxor, Egypt, North Africa, Africa

Tombs of Artaxerxes I (left), Xerxes (centre), and Darius the Great (right), Naqsh-i-Rustam, Iran, Middle East

Detail of the marble sarcophagus of Alexander the Great, Topkapi, Istanbul, Turkey, Europe

Achaemenian tomb of Cyrus II, 559-530 BC, on Murghab Plain, restored by Alexander the Great in 324 BC, Pasargadae, Iran, Middle East

Detail of the marble sarcophagus of Alexander the Great, Topkapi, Istanbul, Turkey, Europe

Great Pyramid of Giza (Pyramid of Khufu and Cheops), and Pyramid of Khafre (Pyramid of Chephren), Giza, Cairo, Egypt

Great Pyramid of Giza (Pyramid of Khufu and Cheops), and Pyramid of Khafre (Pyramid of Chephren), Giza, Cairo, Egypt

The Great Sphinx and Pyramid of Khafre, also known as Pyramid of Chephren, Giza, Cairo, Egypt

Great Sphinx and Great Pyramid of Giza, also known as Pyramid of Khufu and Pyramid of Cheops, Giza, Cairo, Egypt

Trethevy Quoit Megalithic Stone Tomb, Dolmen, Portal Tomb, House of the Giant, Evening Sky, Tremar Coombe, Bodmin Moor, Cornwall, England, United Kingdom, Europe

Stonehenge, Wessex, England, Great Britain, Europe

Merry Maidens, stone circle of 19 megaliths from the Bronze Age, in Penzance, Cornwall, England, UK, Europe

Old grave stone with a relief of the tree of life, cemetery of the Church of St. John the Baptist, Bere Regis, Dorset, southern England, England, United Kingdom, Europe

St. Mary's Church, Brighstone Village, Isle of Wight, southern England, England, United Kingdom, Europe

Chapel of St. Kevin's Kitchen and cemetery, former monastery Glendalough, Wicklow Mountains, County Wicklow, Republic of Ireland, British Isles, Europe

Celtic Cross, Traeth Llanddwyn, Llanfairpwllgwyngyll, Great Britain

Celtic Cross, Traeth Llanddwyn, Llanfairpwllgwyngyll, Great Britain

Prehistoric dolmen at dawn on top of Monte Adarra in Urnieta, near San Sebastian. Gipuzkoa, Basque Country

Portal tomb Lanyon Quoit, Neolithic dolmen in a meadow, Penzance, Cornwall, England, Great Britain

A prehistoric dolmen one spring morning on top of Monte Adarra in Urnieta, near San Sebastian. Gipuzkoa, Basque Country

Prehistoric dolmen at dawn on top of Monte Adarra in Urnieta, near San Sebastian. Gipuzkoa, Basque Country

Old cemetery, St. Ives, Cornwall, England, Great Britain, Europe

Herd of cattle at shelter, portal tomb Lanyon Quoit in meadow, Neolithic dolmen, Penzance, Cornwall, England, Great Britain

A prehistoric dolmen on top of Monte Adarra in Urnieta, near San Sebastian. Gipuzkoa, Basque Country, vertical photo

Stonehenge, Wessex, England, Great Britain, Europe

Stonehenge in front of the setting sun, Wessex, England, Great Britain, Europe

Gravestone of angel holding cross, St Mary's graveyard, Andover, Hampshire, England, United Kingdom, Europe

Old cemetery in front of Porthmeor Beach, St Ives, Cornwall, England, United Kingdom, Europe

Stonehenge, Wiltshire, Great Britain, United Kindom, Europe

Old cemetery with a chapel, St. Ives, Cornwall, England, United Kingdom, Europe

Old cemetery with a chapel, St. Ives, Cornwall, England, United Kingdom, Europe

View of the Great Pyramid and Sphinx of Giza under a blue sky, Giza, Cairo, Egypt

Two of the primary Pyramids of Giza, sunlit with a golden hue, the Great Pyramid (Khufu) under a dark, cloudy sky, Giza, Egypt

Camels with colorful saddles waiting for tourists with the Great Pyramid of Giza in the Distance, Giza, Cairo, Egypt

Close-up of a camel (Camelus) with the Great Pyramids of Giza in the distance under a dramatic sky, Giza, Cairo, Egypt