Connecticut, US
The Old Mine Park Archaeological Site is a historic site in the Long Hill section of Trumbull, Connecticut, United States. It was mined from 1828 to 1920 and during 1942-1946, and has been incorporated in a municipal park. It was added to the National Register of Historic Places in 1990.
Listen to the audio guide for Old Mine Park Archeological Site Free on WIP — starts by itself when you arrive, even with the screen off