The Prison Ship Martyrs’ Memorial is the final resting places for more than 11,000 American prisoners of the Revolutionary War. The memorial was dedicated by President Taft in 1908. The plaza stairway provides a solemn resonance that reflects sound from the stone stairs and echoes through the surrounding trees.

The Endale Arch opened to the public in the 1860s. One of the first architectural elements constructed in Prospect Park, the arch was envisioned by park creators Frederick Law Olmsted and Calvert Vaux as a transporting entrance from the urban hubbub of Grand Army Plaza to the pastoral tranquility of the mile-long Long Meadow. For our purposes, the arch’s natural acoustics create a mesmerizing resonance. In our acoustic experiments at the arch, we found that at either end of the arch we could play music, but hear each other as if we were standing inches apart.

One of the resonant spaces that inspired this project is the Queens Boulevard IRT (7 train) Viaduct. Completed in 1917, the viaduct runs for an eighth of a mile along the center of Queens Boulevard between 32nd Pl. and 47th Street. Its most defining feature is the hundreds of arches with a mysterious resonance that changes from the center of each arch to their edges; at points the echoes overlap, propelling the resonance back and forth between each arch — something that can only be experienced to believe. This Resonant Space is a NYC treasure.

The Archway under the Manhattan Bridge is a spectacular plaza, and one of NYC's truly unique spaces. At 45' high, the cathedral-like Archway is a truly awesome Resonant Space! For decades, Water Street ran through the Archway. Now the archway is a civic center for DUMBO with live performances and markets.

Federal Hall, near Manhattan’s Wall Street, is the site where George Washington was inaugurated and was home to the first Congress, Supreme Court, and Executive Branch offices! Its main rotunda is gloriously resonant — the all-stone interior and curved walls define the rotunda as an incredible Resonant Space.

Located at the southern tip of Manhattan, Castle Clinton stands where New York City began. Initially intended to prevent a British invasion in 1812, the space is now used for live performance and more with its incredible natural acoustics. Castle Clinton exemplifies a unique Resonant Space!