The theatre itself genuinely takes your breath away when you see it for the first time. After a few minutes you settle in and walking around the theatre, exploring the views and the acrostics is great fun. We witnessed quite a few impromptu performances (it is a bit like an open mic night where everyone is enthusiastic applauded even if they are rubbish). The steps are challenging, however, so you may need sensible shoes. The rest of the site is definitely worth a look. I found the stadium particularly interesting. Personally I would recommend not going with a tour party as I thought the parties were a bit rushed and the site is incredibly easy to self navigate.