This staircase leads up to the foot of the Macombs Dam Bridge on the Manhattan side of the Harlem River, and its lacy iron railing bears many similarities to the fencing we saw on the bridge not too long ago. The elevated roadway in the background is the 1,600-foot-long 155th Street Viaduct, which connects the bridge to a part of the street grid that sits atop a steep hill, 110 feet above the level of the river.