Portrait of a long necked Padaung tribe woman, Mae Hong Son Province, Thailand, AsiaThe women of the Padaung hill tribe wear heavy brass ornaments around their neck and limbs. These ornaments look like separate rings but are really a continuous coil of brass that can weigh anywhere from five to twenty-two kilograms and measure up to 30 meter in length. The quantity of visual rings (in reality, the length of the brass coil) is increased every year, according to the age of the woman.

Ring of Brodgar, stone circle dating from between 2500 and 2000 BC, 27 out of 60 stones still standing, UNESCO World Heritage Site, Mainland, Orkney islands, Scotland, United Kingdom, Europe

Aerial image of Danebury Ring, an Iron Age hill fort, Wiltshire, England, United Kingdom, Europe

Aerial image of Badbury Rings, an Iron Age hill fort, Dorset, England, United Kingdom, Europe

A pile of logs stacked and left outside in all weathers to season

Young recently circumcised Masai Warrior (moran) with traditional face paint after 'coming of age' in the Serengei Plains, Tanzania

The parallel roads of Glen Roy caused by an ice dammed lake during the last Ice Age that left rings around the glen indicating the lake levels, Scotland, United Kingdom, Europe

Young woman relaxing in a floating tire in a pool

Palio, medieval joust in Stilo, rider tries to spike a little ring, Calabria, Italy

Aerial picture, roof with solar panels, rotunda, Alt-Oer retirement home, Oer-Erkenschwick, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Badbury Rings, an Iron Age ring fort to the east of Dorset, about 2200 years old, southern England, England, United Kingdom, Europe

Aerial picture, roof with solar panels, rotunda, Alt-Oer retirement home, Oer-Erkenschwick, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Derreenataggart stone circle, Megaliths, Castletownbere, Beara Peninsula, Cork, Republic of Ireland, British Isles, Europe

Archaeology, quarry stone wall, entrance, Iron Age ring fort Cahergall, Cahersiveen, Ring of Kerry, County Kerry, Ireland, Europe

Archaeology, tourists, iron age ring fort Cahergall, Cahersiveen, Ring of Kerry, County Kerry, Ireland, Europe

Badbury Rings, an Iron Age hill fort in east Dorset, built about 2200 years ago, southern England, England, UK, Europe