Lebanon, PA, United States
Union Canal Tunnel. Monument to first canal tunnel in America stands not far up this road. Built in 1823 under this ridge, the tunnel may be reached by a short walk down the hill on either side. The Union Canal was opened in 1827, and operated until 1884.
Listen to the audio guide for Blue plaque № 29134 Free on WIP — starts by itself when you arrive, even with the screen off