These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

An annual festival celebrating Colorado's most famous frozen corpse.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

This super steep hike ascends 2,000 feet in less than a mile.

There are eight natural springs around town, each with a slightly different taste.

This enigmatic building features numerous architectural styles.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

The remains of a 13th-century Franciscan friary have survived multiple attempts at destruction, most recently in 1921.

A Neolithic passage tomb said to have sheltered two legendary Irish lovers.

A remarkably intact castle that once was the largest in Ireland.

The largest stone circle in Ireland.

An unusual manor of stunning beauty, born out of a crippling disease.

Ancient rock-hewn town that witnessed key events of Georgian history.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

A glittering Thai Buddhist temple in suburban Pennsylvania.

This giant disembodied horse head seems to balance impossibly on its nose.

A surprising museum of 20th-century technology.

This tiny structure was built by the creator of the Brooklyn Bridge.

The way these carnivorous dinosaurs are posed is an homage to a classic work of paleoart.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.