My partner had been on about going to this place for months, but as it was in a built up area of the town I thought it would not have been worth it, how wrong I was.
We booked in on the day for the tour and found it quite easily, althought you could easily drive past it 100 time and never notice it, if you were not looking for it.
The guide we had, sorry forgot her name, was wonderful. She was very friendly, happy to answer any questions and very VERY knowledgeable about the coves.
The coves themselves are not really what you might think by the word coves, they are not near the sea although you go have to look out for the "whale" when in the coves......
Without soiling the trip, the coves are a small series of caves that were built somewhere between 1,000 and 150 years ago, but no one knows for sure. The series of rooms, ventilation shafts, tables etc is really facinating and sends your imagination soring as you try to think about who built it, for what purpose and who might have visited.
There are apparently still lots of undiscovered rooms / tunnels attached to the already dug up ones but till they get more funding (or more visitors) they will stay that way so please, head there and give it a try. I would love to return one day to see what else they have unearthed!
All in all its a great few hours out to visit one of the mysteries of Edinburgh.....