This feature is cool, you can actually lie inside it like a granite coffin.
I visited this site a few years back. I was maning a check point for an orienteering event.
Spent about 3 hours here. Even had a snooze in it!
Dr William Borlase, writing in 1754 , said:"Round Arthur's Bed, on a rocky Tor in the parish of North-hill, there are many [rock-basins], which the country people call Arthur's Troughs, in which he us'd to feed his Dogs."
King Arthur's Bed is on private land and access is subject to certain restrictions, which from the end of August 2005 can viewed on http://www.countrysideaccess.gov.uk or in person at Trewortha Farm."
Please make sure you adhere to these restrictions when in force.