Can tourists visit Meteora?

Can you tell me more about visiting Meteora, the famous rock monasteries in Greece? I've heard it's a stunning destination for tourists, but I'm wondering if access is limited or if there are any restrictions I should be aware of before planning my trip. Is it easy to get to from major cities like Athens, and what are some of the best times of year to visit? Additionally, are there any guided tours or specific experiences you would recommend to make the most of my time there?