A stone circle was a number of large stones arranged in a circle.
The Nine Travellers was a stone circle in Boscombe Moor. Surveys never counted a consistent number of stones since three of them were actually Ogri. (TV: The Stones of Blood)
A stone circle in the Welsh village of Llanfer Ceiriog was a gateway to Tír na n-Óg. (PROSE: Cat's Cradle: Witch Mark)
Near the Russian village of Novrosk stood what the inhabitants thought was a normal stone circle. It was actually the antenna of a spaceship from the Arcane Collegiate, which had crashed centuries before and had become buried. (PROSE: The Deviant Strain)
The Pandorica was buried beneath Stonehenge by the Alliance. (TV: The Pandorica Opens)
The House of the Dead was a Welsh pub built in the 15th century on ley lines, inside an old stone circle, on top of a crack in the Cardiff Space-Time Rift. (AUDIO: The House of the Dead)
The Stone Whisperers were a stone circle in England. (AUDIO: The Thirteenth Stone)