Inscope Arch, ca. 1910.

In the 1870s, the crowds of pedestrians were becoming an annoyance to horseback riders and carriage drivers. The bridge which created the Inscope Arch was one of three suggested and built by Olmsted and Vaux in the 1870s, and it is the only one still remaining.

The engineering of the bridge was complicated, as the land it occupied was once a swamp. Though the water had been drained, the soil remained soft and moveable. The resulting structure, rendered in ornamental pink and gray granite, is a half-oval archway, 13 feet 7 inches across at the base and 12 feet high in the middle. Inscope’s underpass is 34 feet long, and it has a 100-foot-long railing on top.