National Museum of Natural History
National Museum of Natural History
C & O Canal National Historical Park
The Chesapeake & Ohio Canal stretches 184.5 miles from Georgetown to Cumberland, MD. Mule-drawn boat trips available (April-Oct.).
Great Falls ParkVirginia
Park open dawn to dusk. Visitor center open 10 am - 5 pm. Mon. - Fri., 10 am - 6 pm weekends and winter hours 10 am - 4 pm.