• Paddling on the Potomac River

    Potomac Heritage

    National Scenic Trail DC,MD,PA,VA

Photo Gallery


 
Eighth-grade student with camera on boardwalk
NPS photo/Donald Briggs

Did You Know?

Dennis Hart Mahan

The design for the Defenses of Washington was based on a textbook published in 1836 called A TREATISE ON FIELD FORTIFICATIONS, by Dennis Hart Mahan. Mahan was a professor of civil and military engineering at West Point.