Load of Fat Dragon STLs up on Humble Bundle if anyone's looking for castles, caverns etc. There's also some paper terrain in the deal if you don't have a 3d printer
https://www.humblebundle.com/books/dragonlock-and-ravenfell-3d-printables-from-fat-dragon-games-booksWe've partied up with Fat Dragon Games to bring you a heaping hoard of 3D-printable models! Create castles and caverns with DRAGONLOCK starter sets, which let you print fully modular, snap-lock terrain for your adventures. Bring your fantasy village to life on your tabletop with a variety of RAVENFELL model sets. Build dungeons, create creatures, and support Children's Miracle Network Hospitals with your purchase!