1. Mummified corpse.
2. The floor is charred in a relatively straight line, as though some sort of sooty tracks were left and then obscured. (Fire Giant sign)
3. The floor has been cleaned here, as have the walls up to knee height. (Water Elemental trail)
4. The area is filled with floating detritus.
5. There are lava flows horizontally to the players. There are stalactites growing in the same manner.
6. The hide of a bugbear has been stuck to the next door. The still living creature can be found in the room.
To be continued.