Norber erratic boulders, the result of glacial erosion, found above Crummack Dale, near Austwick, North Yorkshire, England, United Kingdom, Europe

Glacial Erratic Boulder backed by the Glyderau Mountains, Cwm Idwal, Snowdonia National Park, Eryri, North Wales, United Kingdom, Europe

Big Rock, the largest glacial erratic, Okotoks, Alberta, Canada, North America

Big Rock, the largest glacial erratic, Okotoks, Alberta, Canada, North America

Big Rock, the largest glacial erratic, Okotoks, Alberta, Canada, North America

Mountain panorama from the Koblat-Höhenweg on the Nebelhorn, behind left the Hochvogel, 2592m, in the centre the Schneck, 2268m, and on the right the Höfats, 2258m, Allgäu Alps, Allgäu, Bavaria, Germany

Moeraki Boulders, split rocks, Koekohe Beach, Otago, South Island, New Zealand, Oceania

Moeraki Boulders, spherical rocks on Koekohe Beach, Otago, South Island, New Zealand, Oceania

Moeraki Boulders, spherical rocks on Koekohe Beach, Otago, South Island, New Zealand, Oceania

Dolmen near Locmariaquer, Brittany, France, Europe