The Dark Palace is a new build that I'm adding to War logic
http://warlogic.ca diorama sets. The full complex will include the fort, weapons' factory, and waste/mines fields. Since WarLogic is an integrated gaming system, it needs all sorts of complex dioramas to make use of different elevation, obstacle, command and control, line of sight, and found treasure rules.
The Dark Palace is a mix of Science Fantasy, MOTU, WH40K, Egyptian, Sorcery, and a lot of darkness. As usual the main ingredients are junk, thrift stores, and dollar stores provisions.
I'm adding castle grey skull to the complex but it needs some black oil wash to get it to the same tone of the tower at the top.