[QUOTE=Ferdinand NYC;15953680]The tunnel is just south of Grand Central, in the 30s. There is apparantly some kind of sound exhibit in there. But, when I found that you couldn't ride through, I lost interest.

"Voice Tunnel is the signature event of Summer Streets 2013. Open to pedestrians for the first time in history, the Park Avenue Tunnel, which runs from East 33rd Street to East 40th Street, will be open to pedestrians at the south entrance starting at 7 am."