Olah's Mysterious Castle

From publisher blurb: Built above a gold mine by a crazy wizard, the Mysterious Castle is a maze! Each door is a magical portal that teleports to somewhere else in the castle! A printable battlemap compatible with any RPG/Dungeon-Crawl game. Use as a standalone gameboard, or combine with any same-scale tileset. Contents: A 20 x 30 map depicting a magical castle - fully furnished, but each room is linked by magical portals.