Foggintor quarry ...
is the source of the material used for Princetown Prison and nearby church.
With the advent of the nearby Plymouth - Dartmoor railway 1823 to 1953( horsedrawn to start with) the famous Dartmoor granite found its wayfurther afield.
The cache is a marine flare bottle hidden in the nearby rocks. The container has plenty of room for GeoSwag and trackables. (approx 12 litres in size)
Closest legal parking - N 50° 33.415 W 004° 01.431
This cache was listed on GC.com as GC1AAE1 - 30 x 20 x 20 = 12000 and was until recently on Terracaching.com.
Features in a video by the CO on YouTube ... https://youtu.be/efaoHvdVX9Q
N 50° 33.415'
W 04° 01.431'