We have cacti in several different locations around the greenhouses. They are labeled in every location except one - the area with the most interesting varieties. I think most of these are the cheap store hybrid types that you can find in places like Walmart. Although I like cacti they don't tend to get along well with me. If I pass no closer than 10 metres to a cactus, I still end up with needles in my hands and/or forearms. Well I decided to brave the spines and here are some of the most interesting (No injuries! I guess they just wanted to be famous).
Edit: mr_subjunctive has identified several of these plants below in the comments section. Thanks for the help!