Old New-Gate Prison & Copper Mine Tour — East Granby, Connecticut

Discover the Old New-Gate Prison & Copper Mine Tour in Connecticut

The Old New-Gate Prison & Copper Mine Tour in East Granby, Connecticut offers visitors a rare look at early American industry, punishment, and underground engineering. This historic site tour takes guests into former copper mine tunnels that later became one of the nation’s first state prisons. The experience combines industrial archaeology, colonial history, and immersive storytelling in a dramatic subterranean setting.

Why it’s special:
Old New-Gate Prison is the only surviving example of a colonial-era prison built inside a former copper mine. Visitors descend underground into original mine tunnels once used to confine prisoners, making this one of the most unusual and atmospheric historic tours in New England.

History & Story of Old New-Gate Prison & Copper Mine

Copper mining began at the New-Gate site in the early 1700s, supplying material used for colonial industry and trade. When mining became unprofitable, the underground tunnels were repurposed in 1773 as a prison, housing Loyalists, criminals, and debtors during the Revolutionary War era. The site later evolved into a traditional above-ground prison before closing in the 19th century. Today, Old New-Gate Prison stands as a National Historic Landmark preserving both its industrial and penal history.

What You’ll See & Do on the Old New-Gate Prison & Copper Mine Tour

• Descend into original underground copper mine tunnels

• Learn how mining operations were adapted into prison cells

• Explore surface prison buildings and guard structures

• Learn about Revolutionary War–era justice and incarceration

• View exhibits on early mining technology and daily prison life

• Walk the historic grounds surrounding the mine entrance

Hands-On Elements: Interpretive exhibits and guided explanations during underground tours.
Photo/Video Policy: Photography allowed above ground; restrictions apply inside mine tunnels for safety.
Souvenirs & Extras: Small visitor center shop with books and educational items when open.

Pricing of the Old New-Gate Prison & Copper Mine Tour

Historic site admission
Adult price: $10 per adult

Discounts available for seniors, youth, and Connecticut residents.

Visiting information

Most visits last 60–90 minutes, including underground and surface areas. The experience is best suited for older children and adults, as mine tunnels are dark, damp, and uneven. The underground portion is not wheelchair accessible, and visitors must navigate stairs and narrow passages. Sturdy footwear and a light jacket are recommended.

Exact Site & Tour Hours (Seasonal):
Wednesday–Sunday: 10:00 AM–4:00 PM
Closed: Monday & Tuesday

The site typically operates April through November.

Nearby

• Connecticut Trolley Museum

• Farmington Canal Heritage Trail

• McLean Game Refuge

FAQs About Visiting the Old New-Gate Prison & Copper Mine Tour

Do I have to go underground to visit the site?
No. Visitors may explore surface exhibits and buildings without entering the mine, though the underground tour is a major highlight.

Is the underground mine safe for visitors?
Yes. The mine is carefully maintained and guided, but visitors should be comfortable with low light, cool temperatures, and uneven surfaces.

Is this tour appropriate for young children?
Older children usually enjoy the experience, but very young children may find the underground mine dark or intimidating.

How physically demanding is the underground tour?
Moderate walking is required, with stairs and uneven stone floors. Visitors should be able to walk and stand comfortably.

Are guided tours required?
Underground mine access is typically guided, while surface areas are self-guided with interpretive signage.