What are some ideas for unique or interesting dungeon-crawl challenges?
Not just an unusual trap or monster (no one expects a Barghest!), but take the basic formula - [Room - Trap - Monster - Treasure chest]; how do we flip it on its head, turn it inside out, or even reinvent it completely? And not necessarily for fantasy-type games either. Any "dungeon" type challenge is acceptable
Give me your rooms with weird gravity fields, time reversal chambers, battles in unusual situations, dual dimensional spaces, etc.
x-posted to gmworkshop