Wikipedia
Hjaltadans, also known as Fairy Ring or Haltadans stone circle, is a stone circle on the island of Fetlar in Shetland, Scotland. This site is a ring of 38 stones, of which 22 are still fixed in the soil, and it is in diameter. Inside this is an earthen ring in diameter, with a gap in the southwest side. In the center of the rings are two rectangular pillars.
According to J. Jakobsen, the name Haltadans means: "lame or limping dance". This is a reference to the legend that the circle of stones was once a circle of dancing trolls and that the two rock pillars in the center were once a fiddler and his wife. They had fiddled and danced all night long, and, heedless of the time, were still fiddling and dancing when the sun rose and petrified them all.