In Old San Juan there are two large forts to visit that protected the old town and it's port entrance a long time ago and are managed by the National Park Service. Here in Vieques, this fort that served the same purpose is much smaller, not fully intact and locally managed. On my visit last week there was no admission fee nor would they even accept a donation. This initially surprised me but then while touring it I realized that this museum is still recovering from Hurricane Maria. Therefore not all of the normal displays are out for view but I still think this fort/museum is worth your time to visit.
It takes about one minute to drive here when you leave the downtown area of Isabel II. At its unassuming entrance you drive up a steep hill to the fort. Parking is mostly on grass wherever you want to. Up there is the old fort brick entrance and the old fort brick walls with a few cannon added in. This area offers a commanding view of the town, port and Puerto Rico about 10 miles offshore. It is beautiful up there.
Inside the newer building (built in 1991 that houses the indoor artifacts) it's a 2 story structure with exhibit rooms on both floors. It's open air ventilation with usually a breeze blowing though. Budget about 15-20 minutes to visit here. read more