The Dungeon of Dori is an idea percolating in my head for a Dungeons & Dragons session (could be used for any RPG, really). This is the initial sketch of the dungeon/castle/place-to-cause-mayhem including hidden doors and a huge slime monster … or maybe a water feature … who knows?!
I picture a drab, gray stone castle with odd nooks on the outside, leading visitors to think they’ve found an entrance only to find it’s an architectural feature of the insane Dori. There are a couple of exterior doors, which are hidden … naturally (the squiggly lines are hidden doors). Even the interior is full of hidden doors, which make for quicker movement for those who are familiar with the interior.
The inside is dark and cold, with a constant echo of dripping water. I also like the idea that the filled in areas area actually pillars hiding secrets inside of them.
And Traps? Oh yes. How could the insane Dori not have wicked traps?!
Speaking of traps, Roll 20 has a nice summary on traps and some sample traps in the D&D 5th Edition Compendium here.
And Shawn Ellsworth covers some traps and hazard examples in the article A Collection of Traps & Hazards (D&D 5E)
I also found the Power Score’s Dungeons & Dragons – Traps in 5th Edition had a nice gathering of information on dealing with traps and trap examples.