Lanyon Quoit, a megalithic dolmen located northwest of Penzance, in Cornwall. Its capstone is 5.5 metres long, and weighs more than 12 tonnes.

In the 18th century the quoit had four supporting stones and the structure was tall enough for a person on horseback to ride under. On 19 October 1815 however, Lanyon Quoit fell down in a storm. Nine years later enough money was raised by local inhabitants to re-erect the structure, under the guidance of Captain Giddy of the Royal Navy. One of the original stones was considered too badly damaged to put back in place, thus there are only three uprights today and the structure does not stand so high as it once did.