16x16 Town Remix
I took Surt's Town Tiles and combined them with Redshrike's RPG Indoor Tileset Expansion 1, added a bit of my own stuff and edited it all together. I added the beginnings of a castle tileset as well, but it will only work with some creative thinking and lots of layers ATM. I've only included the tiles that I edited, so to map something that looks like the previews you'll need to download the other sets as well.
Surt's tiles: http://opengameart.org/content/town-tiles
Redshrike's tiles: http://opengameart.org/content/rpg-indoor-tileset-expansion-1