In the early 80s, I learned a few basic driving skills at
Harrabeer, which we all just knew as Yelverton Air Field. There wasn't much left of the buildings - a few bunkers - but the runways were quite distinct and, looking at Google Maps, that hasn't changed. Not much happens on Dartmoor - given that they've only just worked out that the many dry stone walled animal pens elsewhere on the moor are Neolithic and not medieval, I'd imagine the airfield will be there for a while.
Quite a few craters in the moor around there too - I guess from abortive or lost raiders on Plymouth.
R