There are 11 barrows here on Challacombe ('Homer') Common. Westcote (in his 1630 history of Devonshire) said that these "divers hillocks of earth" were supposed to have fiery dragons flying and lighting on them*.
Nearby you may find the Negus stone which commemorates an 18 year old, Robin Negus, who thought the place was top.
*I haven't read the original but this was noted in
The Folklore of Devon
Folklore, Vol. 75, No. 3. (Autumn, 1964), pp. 145-160.