The site of the first "historically true" UFO encounter in the U.S.

This railroad tunnel was once the longest in Massachusetts.

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

Resonating tubes make music from highway overpass.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

All that remains of this Massachusetts town, demolished in the name of progress, is a stone marker.

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

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

This rare symbol of Eastern philosophy in the West has been created over years of painstaking construction by the local community.

Over fifty whirling pools left by the glacial age.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

Formerly secret, precariously perched boulders.

A bizarre house filled with an astounding array of collections.

An oddly poignant roadside attraction celebrating American folklore.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

A large circus museum with summer performances.

"Iron Age" creatures fill this huckster's rusted metal sculpture garden.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A beautiful but toxic fountain of mercury.