An octet of classic chrome trailers speared into the ground act as a tribute to the silver bullets of the open road.

Electrical pylon in the shape of Disney's beloved mouse.

The world's largest private aircraft collection.

A haunted hill that supposedly defied gravity.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

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

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

The highest bridge in America was built for an almost unnervingly small amount of money.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Art Nouveau painter Alphonse Mucha spent 18 years creating these monumental paintings of Slavic history and mythology.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

There has been an astronomical clock on this spot since the 14th century.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

A church of bones, decorated with 40,000 human skeletons.

An interactive exhibition space dedicated to the kinetic sculptures of Swiss artist Jean Tinguely.

One of the world's largest collections of pharmaceutical artifacts.

This artistic fountain display pays homage to this area's theatrical history.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.