The main reason I pick this one as my winner was its unique design and the fact that I kept thinking of great adventure ideas to fill it.
A also choose two Runner Ups:
Tiogshi Laj's Sacrifice Halls:
It was a little on the busy side, but it seemed to used such a wide variety of tile sets.
John Reiher's Swamp Castle:
Super clean design and also gave me ideas for an adventures.