Here's what Trippy members say about Nis Fortress:
"if you want to relax go to Zlatibor mountain, it's a national park will clear your mind, if you want a history lesson check out Višegrad and read nobel prize winning book bridge on a drina, Pećka Patrijaršija/Metohija, Niska Tvrdjava, Mostar, Banja Luka, Dubrovnik, Nis Fortress, Petrovaradin Fortress, Kalemegdan, Smederevo Fortress, Raška, Tvrdjava, Cetinje, Lovćen Niksic, you can't really get wrong, wherever you go." See More