During the construction of the new Third Avenue subway line in 1958, the MTA hit a wall—a brick wall, deep underground and right in the middle of their proposed route. None of the property owners in the area could claim this wall, nor its unmarked door or the space it enclosed. Without access to this parcel, plans for the tunnel were halted indefinitely. Tonight is the semi-annual open house for The Third Avenue Chamber!
A scale model of this walkthrough attraction was mostly constructed in Autumn 2018. While the characters remain unfinished and the project is on hold, The Third Avenue Chamber—much like its namesake—may pop up again at any time.