One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

This unassuming Massachusetts residence was built with a trap door to hide escapees on the Underground Railroad.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

Once the largest gravity dam in the world.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

The only surviving building of historic West Boylston, which was flooded to create the Wachusett Reservoir.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

The proud hometown of an American legend has honored their favorite son with what seems to be a gravestone.

Funded entirely by volunteers and donors this military memorial features a tank with a comedy line on its barrel.

In a town that's had a whole lot of giant chairs this one still stands tall, just not the tallest.

In order to save this beloved rock, locals blew it up and put it back together piece by piece.

This massive boulder is inscribed with the story of a sensational hostage negotiation dating back to Colonial times.

This railroad tunnel was once the longest in Massachusetts.