Never been there. How long does it take?
The “tour” is about 40 minutes or so. I found it very gruelling; I have very bad equilibrium and the “Spot” really kicked it into high gear.
But it was so much fun! The guides are all young people (you’d have to be young to climb around all that steep stuff!) You find yourself NOT wanting to believe it, but if it’s a hoax, it’s so incredibly performed that no one can figure it out.
Next time I’m going to take some Merazine. Hehehe.
You should do it! (weekends are swamped with tourists; you can make a reservation on line. I would rather go on a weekday)