Grand Army Plaza comprises the northern corner and the main entrance of Prospect Park in the borough of Brooklyn, New York City, and consists of concentric oval rings arranged as streets, with the outer ring being the namesake Plaza Street. The inner ring was originally intended to be a circle, but it actually was arranged as a main street – Flatbush Avenue – with eight radial roads connecting: Vanderbilt Avenue; Butler Place; Saint John’s Place (twice); Lincoln Place; Eastern Parkway; Prospect Park West; Union Street; and Berkeley Place. As completed, the only streets that penetrate to the inner ring are Flatbush Avenue, Vanderbilt Avenue, Prospect Park West, Eastern Parkway, and Union Street.