Start with establishing info, things that describe the mood, and finish with interactive elements.
* Room size and dimensions * Light and Light sources. * Visible Doors and Exits. (Including stairs). * Large objects. (Pillars, Dias, Pedestals, Statues, Pit, Chasm, Stream, Lava). * Furniture. ( Tables, Chairs, Cabinets, Torture Implements ) * you want to go further
Don't forget other senses of each thing: * Sounds, smell, feel, temperature, * Is anything overwhelming, hard to notice
While increasing the age of a dungeon can be an easy way to add to the atmosphere and intrigue of a dungeon, doing so limits the dungeon's potential contents. When designing old dungeons, keep in mind elements that change over time: