An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

The oldest place in Hartford is a cemetery with thousands of bodies stacked beneath the grass.

An abandoned gun-funded 19th century utopia.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

This tribute to the founding father of the American dictionary originally contained a spelling error.

This lovely hilltop tower was specifically built to withstand 100 MPH winds.

Who knew the Devil's domain was a hot spot for tubing?

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of Paul Revere's historic two lantern warning.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Behemoth, cannon-like telescope operated by generations of Irish earls.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.