No Entry sign at neolithic prehistoric mound of Silbury Hill, to avoid further human erosion, Wiltshire, England, Silbury Hill mound, the largest prehistoric manmade structure in Europe, Wiltshire, England, United Kingdom, Europe

Reconstruction of buildings, Los Millares prehistoric Chalcolithic settlement archaelogical site, Almeria, Andalusia, Spain, Europe

Neolothic stone circle of granite boulders, Cromeleque dos Almendres, Evora district, Alentejo, Portugal, Europe

Silbury Hill mound, the largest prehistoric manmade structure in Europe, Wiltshire, England, United Kingdom, Europe

Burial chamber tomb mound, Los Millares prehistoric settlement, Almeria, Andalusia, Spain, Europe

Silbury Hill mound, the largest prehistoric manmade structure in Europe, Wiltshire, England, United Kingdom, Europe

Silbury Hill neolithic site, the largest manmade prehistoric structure in Europe, Wiltshire, England, United Kingdom, Europe

Fulacht fiadh water trough and fireplace building at Drombeg stone circle, County Cork, Munster, Republic of Ireland, Europe

Silbury Hill neolithic site, the largest prehistoric manmade structure in Europe, Wiltshire, England, United Kingdom, Europe

Los Millares prehistoric Chalcolithic settlement archaelogical site, Almeria, Andalusia, Spain, Europe

Ancient Burial Mound, Newgrange, UNESCO World Heritage Site, County Meath, Republic of Ireland (Eire), Europe

Entrance and defensive walls Los Millares prehistoric Chalcolithic settlement archaelogical site, Almeria, Andalusia, Spain, Europe

Reconstruction of buildings, Los Millares prehistoric Chalcolithic settlement archaelogical site, Almeria, Andalusia, Spain, Europe

The Talati de Dalt, prehistoric, neolithic remains of Talayotic culture, Menorca (Minorca), Balearic Islands, Spain, Mediterranean, Europe

Neolithic archaeological site of Karahan Tepe, circular stone structure with T Shape pillars, Sanliurfa, Turkey, Asia Minor, Asia

Defensive stone walls of Dun Aengus, prehistoric hill fort, Inishmore, largest Aran Island, Galway Bay, County Galway, Connacht, Republic of Ireland

The Jaguar Temple at the Mesoamerican archaeological site of Lamanai (Submerged Crocodile), Belize

Ring of Brodgar, UNESCO, Orkney Islands, Scotland, United Kingdom

Standing Stones of Stenness, dating from around 3000BC, UNESCO, Orkney Islands, Scotland, United Kingdom

Neolithic archaeological site of Karahan Tepe, circular stone structure with T Shape pillars, Sanliurfa, Turkey, Asia Minor, Asia

South section of Torre d'en Galmes, a Talayotic site on the island of Menorca, Balearic Islands, Spain, Mediterranean, Europe

South section of Torre d'en Galmes, a Talayotic site on the island of Menorca, Balearic Islands, Spain, Mediterranean, Europe

Mnajdra Temple, on the island of Malta

The ancient Greek city of Mycenae, UNESCO, an archaeological site near Mykines in Argolis, north-eastern Peloponnese, Greece

Naveta d'Es Tudon, megalithic chamber tomb, 1130-820 BC, Menorca, Balearic Islands, Spain, Mediterranean, Europe

Taula de Torre Trencada, prehistoric, neolithic remains of Talayotic culture, Menorca (Minorca), Balearic Islands, Spain, Mediterranean, Europe

Naveta d'Es Tudon, megalithic chamber tomb, 1130-820 BC, Menorca, Balearic Islands, Spain, Mediterranean, Europe

Prehistoric structure, Torralba d' en Salort, archaelogical site, Minorca, Spain

Unesco World Heritage Site Su Naraxi, Bronze-age defensive structure, Barumini, Sardinia, Italy, Europe

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

Newgrange, County Meath, Ireland

Person On Top Of Rocky Peak