Kobold Hall

You travel 15 miles from Fallcrest into the wilderness to
find the once-sprawling manor now known as the ruins of
Kobold Hall. Inside the keep, you find a trapdoor at the base
of an old guard tower. It must lead beneath the ruins.

Kobold Hall is the mini adventure at the back of the DND 4e DM guide. This board is ready to play and almost one to one creation of the map in that guide.

Updated to include town ruins up above the kobold halls. Hide volumes included

Credit to winstonthebutterfly for the town ruins