Old New-Gate Prison and Copper Mine

Old New-Gate Prison and Copper Mine was the first copper mine chartered in America and is believed to have been the first copper mine in the thirteen original colonies. It was also the site of the first state prison in the United States. Mining began in 1707, the date of the charter, and continued through the 1850’s. The site was designated a national historical landmark by the American Society for Metals in 1976.

East Granby, Connecticut · United States