Portsmouth Naval Prison

Portsmouth Naval Prison is a former U.S. Navy and Marine Corps prison on the grounds of the Portsmouth Naval Shipyard (PNS) on Seavey's Island. The building has the appearance of a castle. The reinforced concrete naval prison was occupied from 1908 until 1974.

RUINED STRUCTURE
1974

Alternative Names

Alcatraz of the East

Type

Prison

Parent Location

Seavey's Island

Included Locations

• Seavey Island HIPS Reactor Core