so I was wandering around Raven wood and night side and I noticed for the first time there were towers with the school symbol on the door so I go in expecting a enemy or something like that or a place where you can buy other spells but to my surprise nothing absolutely nothing but a bunch of books and a desk with the teachers portrait behind it
there is a tower for each one
so um as always slap a in your message if you like
Yes, that's basically what they are. It's a great place to meet up with friends/host parties with friends if you so desire. There are a couple of times where you enter the various Towers for quests. (Some school specific quests and a few storyline ones) For example you must enter the Myth Tower before you can go to DS for a certain quest and you must enter the Ice Tower for a quest before you gain access to KH. Hopefully that helps!