https://en.wikipedia.org/wiki/Prospect_Park_(Brooklyn)
A garage compound used by NYC Parks abuts the villa directly to the south. The Tennis House, constructed in 1909–1910 by Helmle, Hudswell and Huberty, is located on the Long Meadow at West Drive, west of approximately 8th Street. The structure is a neoclassical structure made of limestone and brick, with a red tile roof.