AAA Editor Notes
Colvin Run Mill Historic Site is on SR 7 at Colvin Run Rd., 7 mi. w. of I-495 (Capital Beltway) exit 47A. The restored 19th-century mill still grinds cornmeal and whole wheat flour, and the miller's house and barn contain historical exhibits. A general store also is on the grounds.
Guided tours are available. Picnicking is permitted.