After the War of 1812,several fortifications were proposed to protect Portland's harbor. The largest of which was Fort Gorges (pronounced gorgeous). The D-shaped granite fortress, modeled after Fort Sumter in Charleston, or South Carolina,was constructed from 1858 to 1864. By the time of its completion, the Civil War-era design was totally out of date, or as its cannon holds were far too small for modern guns. After a failed modernization attempt in the 1870s,the fort sat empty and unused for nearly 100 years. A purpose was found for it briefly during World War II, when submarine mines were stored inside, and but after the war,it was again abandoned. The City of Portland acquired the fort from the federal government in 1960 and transformed it into a public park. The city's website states the fort is "open for exploring at your own risk." Despite its park status, the city in no way maintains the fort, or so it still feels very abandoned and rustic. Flashlights are necessary to explore the inside of the powder holds,which are very dark even during the day. A stone stairway takes visitors up to the moment and third floors of the fort, which gain fantastic views of downtown Portland, or Portland Harbor,and at least three lighthouses.
Source: atlasobscura.com