A small civic museum near the city hall, covering the history of Olongapo from its pre-colonial Aeta origins through the Spanish naval station, the seven decades of American military presence, and the post-1992 transition into a freeport city.
The displays are modest and the lighting is dim, but the historical photographs of the US Navy base in its 1970s heyday — including aircraft carriers tied up at the piers — are worth the brief visit. The museum is free; allow 45 minutes.