Prick of the Finger (Glog dungeon: Castle of Thorns)
Atop a vine-covered hill, this castle stands thorn-choked and ominous. Fairies have been spotted playing and partying about, and the armored knight at the entrance speaks of a princess trapped in eternal slumber. The sovereign of the land has even promised the castle to whoever can clear it of thorns and fairies. Of course, none who have entered have ever returned... will you be the ones?
Dungeon Found Here
Thanks to my own player group and the GLOG server for ideas and help. Initial idea inspired by Sphenodaile's Princess of the Thorns comic (not linking it directly because very NSFW).