King Arthur's Hall is a megalithic enclosure on Bodmin Moor in Cornwall, England.

[1] The monument consists of fifty-six stones arranged in a rectangle with a bank of earth around them and measures approximately 20m by 47m.

[4] Some clearance and investigation of King Arthur's Hall was conducted by members of The Heritage Trust in 2013/14.

[4] It was concluded that over time the earth had covered over the top of the revetment wall and that around 140 upright stones now lie buried, recumbent, or standing at an angle.

[4] It was suggested that the structure originally formed a tank which filled with water, or was possibly used ritualistically.