Things to share that the Q did not know. First, the Parthenon across from the Parade Ground is called The Peristyle. Second, it has an address - 96 Parkside Avenue. Third, it is likely part of the ghost situation at 123 on the Park, at least in the sense that ghosts go there to play croquet, since this is also apparently known as the Croquet Shelter. The wickets are likely ghosts as well, for I see no way to append them to the floor.
Then this wonderful postcard via Montrose Morris in her piece on said Colonnade:
The Q at Parkside
News and Nonsense from the Brooklyn neighborhood of Lefferts and environs, or more specifically a neighborhood once known as Melrose Park. Sometimes called Lefferts Gardens. Or Prospect-Lefferts Gardens. Or PLG. Or North Flatbush. Or Caledonia (west of Ocean). Or West Pigtown. Across From Park Slope. Under Crown Heights. Near Drummer's Grove. The Side of the Park With the McDonalds. Jackie Robinson Town. Home of Lefferts Manor. West Wingate. Near Kings County Hospital. Or if you're coming from the airport in taxi, maybe just Flatbush is best.