Lots
Off season its not as crowded as summer
We went as part of a group quite early, probably the first on Sunday. They do guided tours, which is quite interesting
Go as early as posible. We went right before they open and were the first group, it was awesome (there was absolutely no line). When we got out it was pack. Completely worth it.
Depends on the season .. i think in summer you can expect around 50-100 people
As much as possible
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