Castle Gatehouse is a pumping station on Georgetown Reservoir, D.C. constructed in the likeness of a medieval castle.
Whilst clearly a more modern structure (it was constructed in 1901) the property's architecture is (externally) that of a symmetrical yet simplistic, 'real' castle. With a tower on each of its four corners, crenellations along the top of its perimeter walls and narrow 'windows', the waterside castle is certainly an unlikely sight on the edge of the nation's capital.
As a pumping station, the castle is not accessible to the public but can be seen from the adjacent road (MacArthur Boulevard NW).
The castle is listed on the National Register of Historic Places.
Castle Gatehouse on DCPreservation.Org
MacArthur Boulevard NW, Washington D.C.
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