I cannot remember which published dungeon I was recreating, but here's some more inspiration of a 3D dungeon set I created for a client. The design of the pieces were meant to be reusable, thus be as versatile as possible and also work with my pre-existing modular dungeon setup.
They are created in Hydrostone (think of it like very fine and hard stone) using Hirst Arts molds (and other custom things) as building block bases.
Salzman Dungeon on Imgur
Unfortunately, I do not have a picture of the final dungeon set up as a whole. :( I simply forgot to take a picture of it assembled.