Here's a few things you need to know. There is a day and and an evening tour, an evening one is twice as expensive( about $25)but it also includes going all the way up to a glass light house and "wine tasting" For starters, the views are actually better during sun light because BA isnt exactly New York or Paris when it comes to how well its lit during the night. Second, the " wine tasting" consists of just one kind of wine and i personally didnt care too much for it, it was way too strong and bitter. Also, if you are over 6 feet tall and/or weight over 250 pounds you may simply not fit in a small narrow passage of circular stairs. Im 5"10 and weigh 170 lb and at times I had to duck and turn sideways to sqeeze through. With people directly in front and behind you it can get pretty claustrophobic. Once you get on top the view is beautiful and the experience is exilarating because you are standing on a tiny balcony with a rail that is barely half your height at about 300 feet up in the air.