Lots of places to visit. Some make charges, but not all. This is the list of planned openings for June 2015. You need to book places. Viv.
https://www.birminghampost.co.uk/news/local-news/hidden-spaces-unlocked-full-listings-9340902
https://www.birminghampost.co.uk/news/local-news/hidden-spaces-unlocked-full-listings-9340902