I'm not in a time/space position to write, I am slacking off other things that need to be done to be on the internet right now, but I have some ideas bouncing around in my head, and thought I would toss them here. See if anyone pecks at them any, maybe see if they are worth pursuing.
7 Atypical Dungeons
basic listicle, but throw the cliche underground mine/tunnel dungeon. Pick out salient points of dungeons, isolation, monsters, etc, and expand. The abandoned space station, the underwater base, the abandoned hospital, the hell house.
7 Thrones
Take the concept of the throne and move it beyond the throne room. Kirk's captain's chair was the throne of the enterprise, likewise, judge's chair is the Throne of Justice, and so forth.
Hell Houses
drawing on horror movies, Hell Houses have extradimensional space for hidden passages, hollow walls, unseen basements, attics, room under the stairs for victims. Basic horror trope, haunted house, House of 1000 Corpses, AHS: Murder House, and so forth
Space Stations whose layout and design are based off of large modern structures like malls, hospitals, and apartment complexes
Large spaceships based off the mill and other factories, with shipping docks being space docks, shipping departments being the cargo bays, the offices the command center, and engineering/drive section being building maintenance, and so forth.