Fort William and Mary
Fort William and Mary, Colonial fort in New Castle, United States
The stone fortification stands at the mouth of the Piscataqua River, protecting Portsmouth Harbor with thick walls and multiple gun emplacements.
In December 1774, local Patriots conducted two raids on the fort, seizing gunpowder and cannons before the start of the American Revolution.
The fort exemplifies early American coastal defense architecture, with its design reflecting both British colonial and early United States military engineering principles.
Visitors can explore the fortification grounds daily from dawn to dusk, accessing the site through New Castle Common near Portsmouth Harbor Lighthouse.
The structure housed New Hampshire's first British garrison and contained the largest gunpowder storage facility in northern New England during colonial times.
Location: New Castle
GPS coordinates: 43.07132,-70.71021
Latest update: May 10, 2025 18:26
Portsmouth Naval Prison
1.8 km
Odiorne Point State Park
2.5 km
Fort McClary
1.3 km
Memorial Bridge
3.6 km
Fort Stark
1.5 km
Bray House
1.4 km
Fort Foster
1.6 km
Portsmouth Harbor Light
139 m
Wentworth-Coolidge Mansion
2.6 km
Whaleback Light
1.8 km
Prescott Park
3.5 km
Wentworth-Gardner House
3.3 km
Lady Pepperrell House
1.2 km
First Congregational Church and Parsonage
1.2 km
William Pepperrell House
1.4 km
John Paul Jones Memorial Park
3.6 km
Mark Wentworth House
3.6 km
Portsmouth Cottage Hospital
3.6 km
Gerrish Warehouse
1.3 km
Rice Public Library
3.2 km
General Porter House
3.6 km
South Meetinghouse
3.5 km
William Dean Howells House
1.1 km
Kittery Community Center
3.6 km
Samuel Badger Monument
3.3 km
Mark F. and Eliza J. Wentworth House
3.2 km
Haven-White House
3.6 km
Shapley Town House
3.6 kmReviews
Visited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes