Supposed Massachusetts Grave of a pre-Columbus Knight Templar.

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

Narrowest house in Boston.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

No one really knows how these old hobby horses got here, but the herd keeps growing.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A historic bridge with a lovely acoustic anomaly.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

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

A steampunk wonderland that preserves America's history of industrial innovation.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

America's "second most important bell" is a contentious spoil of the Civil War.

This classic red schoolhouse is said to have been where Mary and her little lamb went to school.