Where are the underground tunnels built by masons in New York City and Boston in 1760's~1780's? Do they exist till our present day?
I've found something:
However, it appears this info was copied directly from another article(warning: large file) which goes into much deeper detail about the tavern. However, it says no more about the tunnel. It does not say when the building was constructed, but it does allude to the late 1700s. It is found in Monroe, New York. It could be what you're looking for.