There is a theory that there is some connection between King Arthur's Round Table and Mayburgh Henge, some 400 yards away. The orientation of the entrance to Mayburgh, which faces the Round Table, gives some credence to this theory, but there are no real facts to back this up.
There is quite little to see at the Round Table, and the location, so near the busy A66, does little to give you a sense of the site in ancient times.
The site is administered by English Heritage, and is open at any reasonable time.
Attraction Type: Prehistoric Site
Location: 1 mile s of Penrith on the west side of the A66
Website: King Arthur's Round Table
English Heritage - see also: English Heritage memberships (official website)
Opening Details: Open access site, usually accessible at any reasonable time