Dungeons. It's a place that adventurers find themselves in all the time (I was actually surprised to see that this book hadn't come out yet). And they can be filled with just all manner of random stuff. As such, Skirmisher Publishing is giving you 100 Oddities for a Dungeon, the next in their extremely popular 100 Oddities line of RPG supplements.
From the website:
Welcome to “100 Oddities for a Dungeon,” the sixteenth entry in Skirmisher Publishing’s popular and bestselling line of system-free sourcebooks designed to make any areas or encounters taking place in them more fun and interesting!
This supplement is dedicated to dungeons in the classic sense of places used to confine and punish people, including prisons, jails, oubliettes, and torture chambers; as described in the works of authors like Edgar Allan Poe (e.g., The Pit and the Pendulum), Alexandre Dumas (e.g., The Man in the Iron Mask), and the Marquis de Sade (e.g., Justine); and as presented in cinematic works ranging from those of Hammer Films to the entries of the “Saw” franchise. They range from famous historic sites like the Bastille in Paris to the hidden cells maintained by a disproportionate number of villains.
Oddities are designed to help storytellers make places in their scenarios as memorable as those that have appeared in innumerable sources like those mentioned above and to fascinate and engage characters and prompt them to ask questions like “Why is this thing here?”, “What is that for?”, or “Who would do something like this?” They are intended to aid creativity, to turn possibly bland areas or encounters into something more, and to take your imagination in directions it might not otherwise have gone.
As with other “Oddities” volumes, all of the entries in this book can be used separately or in conjunction with one another to add evocative details to any sort of appropriate area or encounter and in any manner that suits the needs of a particular storyteller. “100 Oddities for a Dungeon” also includes a Random Prisoner Generator for when you need to quickly fill out some of the cells in your prisons.