819-868 - Knowth, a Neolithic passage grave, ancient monument, UNESCO World Heritage Site of the Bru na Boinne, Drogheda, County Louth, Leinster, Republic of Ireland, Europe
1184-1681 - Knowth, Neolithic passage grave, UNESCO World Heritage Site, prehistoric Bru na Boinne, Valley of the River Boyne, County Meath, Leinster, Republic of Ireland, Europe
1184-1683 - Knowth, Neolithic passage grave, UNESCO World Heritage Site, prehistoric Bru na Boinne, Valley of the River Boyne, County Meath, Leinster, Republic of Ireland, Europe
1184-1680 - Knowth, neolithic passage grave, UNESCO World Heritage Site, prehistoric Bru na Boinne, Valley of the River Boyne, County Meath, Leinster, Republic of Ireland, Europe
1184-1679 - Knowth, neolithic passage grave, UNESCO World Heritage Site, prehistoric Bru na Boinne, Valley of the River Boyne, County Meath, Leinster, Republic of Ireland, Europe
83-12811 - Salt pans still in use at El Carmen Salinas and Salt Museum on the east coast, Caleta de Fuste, Fuerteventura, Canary Islands, Spain, Europe
83-12812 - Salt pans still in use at El Carmen Salinas and Salt Museum on the east coast, Caleta de Fuste, Fuerteventura, Canary Islands, Spain, Europe
83-12813 - Salt pans still in use at El Carmen Salinas and Salt Museum on the east coast, Caleta de Fuste, Fuerteventura, Canary Islands, Spain, Europe
733-6434 - Cheomseongdae Astronomical Observation Tower, Royal Tombs burial mounds, UNESCO World Heritage Site, Gyeongju, Gyeongsangbuk-do, South Korea, Asia
764-4696 - Dead juniper trunk and sandstone cones, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America
832-259864 - Blahver, blue spring, the most beautiful blue water pool in Hveravellir in the Highlands, in front of Oeskjuholt, a steaming calc-sinter mound which looks like a mini volcano, Hveravellir, Iceland, Europe
832-238562 - Museum Friesenstube, Frisian living room, on Honkenwarft dwelling mound, Hallig Langeness, North Frisia, Schleswig-Holstein, Germany, Europe