One of the most picturesque ruins in Volusia County is the Addison Blockhouse which lies deep in the flatwoods on the west side of the Tomoka River. This small coquina rock ruin is roofless, with one small round tower on one corner. Inside the blockhouse is a large fireplace. The walls of the building rise about six feet the tops of the walls have somewhat of a “battlemented” appearance with an embankment and bastions-like moat extending around the blockhouse.