A suggestion : Maybe the Sech nevali monastery in Varisia unchained between three mountains on the top of an inversed mountain ? In my mind, it is a thassilonian ruin created by the first emperor Xin in three days. Inside is a demi plane. A shelter for the Cabale, one of the most and ancient organisation of Golarion.
-Mayor Kusanagi in a Fuchikoma (Ghost in the Shell) -Jin and Mugen (Samurai Shamploo) -The faun (satyr?) (from Guillermo del Toro Pan's labyrinth) -Hellboy cast (Hellboy, Liz Sherman, Abe and Roger) -Steam Punk characters -US civil war and pre-civil war characters -Sci fi robotic armor and soldiers