The Czarina's villa, built in 1898 in the grounds of the long established Valtion Hotel, Punkaharju esker, Lake Saimaa, Finland, Scandinavia, Europe

Aerial photography of an esker, a sandy ridge formed by subglacial deposits of sediment in the last Ice Age, in Manitoba, Canada, North America

Aerial view of lakes and an esker, a ridge formed by sediment deposited during the last Ice Age, in northern Manitoba, Canada, North America

Mountaineers sheltering in an old snow hole in snow banked against an esker in Coire an Sneachda in the Cairngorms, Scotland, United Kingdom, Europe

Mountaineers sheltering in an old snow hole in snow banked against an esker in Coire an Sneachda in the Cairngorms, Scotland, United Kingdom, Europe

Mountaineers sheltering in an old snow hole in snow banked against an esker in Coire an Sneachda in the Cairngorms, Scotland, United Kingdom, Europe