Greywacke Arch is named for the material with which it is built, a sandstone found in the Hudson Valley.
Located just south of the Obelisk, Greywacke Arch carries the East Drive over a pedestrian path that connects the Great Lawn area with the landscape behind the Metropolitan Museum of Art. The arch is one of the Park’s most ornate, with distinctive elements such as a pointed archway, inspired by Moorish architecture, and a cast-iron railing in an elaborate trefoil pattern.
Central Park’s arches and bridges are an integral part of its circulation system. The Park’s designers, Frederick Law Olmsted and Calvert Vaux, created an intricate system of pedestrian paths, a bridle path, and carriage drives to allow visitors to experience the Park’s landscapes in a variety of ways. However, for this system to work safely and in a relatively small space, it had to limit interactions between potentially conflicting forms of traffic. The Park’s arches and bridges separate this traffic by carrying one form of transportation over another.
Between 1859 and 1866, 27 arches and bridges were built in Central Park. All were designed by Vaux—in some cases with the assistance of fellow architect Jacob Wrey Mould. Each one is unique, designed with various materials and decorative motifs and with careful consideration of its placement in the landscape. Over time, six arches and bridges were added and three were removed, bringing the total to 30 ornamental bridges and arches in the Park today. There are also additional bridges in the Park’s woodlands that are smaller, constructed with wood, and typically cross over streams.
Another key part of this circulation system are the transverse roads that allow City traffic to cross the Park. The transverse roads are sunken below the grade of the Park with bridges crossing over them. These bridges were designed as more utilitarian structures and weren’t intended to be seen—but they allow pedestrians and other traffic to seamlessly move through the Park. There are 13 transverse road bridges (one of which, Denesmouth, is also considered an ornamental bridge).