Fort Pitt Blockhouse

          Constructed in 1764, the Fort Pitt Blockhouse is the oldest building in Pittsburgh.  By 1893, long after the rest of the fort had been torn down, this old outbuilding was being used as a house.  It stands in the Point State Park, which is Pittsburgh's answer to Manhattan's Central Park.  It's a pleasant riverside patch of greenery, park benches, paved walkways, and broad lawns: one of the only truly flat places in town.  It's also where the city got started, with two museums to show for it, as well as the outlines where the old French and English forts once stood.  But alas, it's been undergoing massive renovations, and most of the park has been closed for a long time.