This small road tunnel is the only place where you can cross beneath the Erie Canal.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

A shrine contains nearly 200 statues of the Buddhist deity Jizo, dressed in bibs by parents who have lost a child.

This retro underwater observation tower would make the perfect lair for a sea-loving villain.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

A giant steel sculpture with animals in its shadows.

Antique skeletons and taxidermy creatures were found crammed in a university closet.

A 19th-century architectural wonder designed by the "father of the skyscraper."

This Elizabethan hedge maze is one of only six in North America.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Only six people can sit inside this delightfully quaint sanctuary.

Buffalo's abandoned concrete grain elevators are getting a second life.

The absurd creation is a compulsory destination for selfies in Buffalo.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The resting place of 18th century German mummies.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

San Francisco's newly reopened hands-on science museum.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The magical, mossy forest that inspired Princess Mononoke.

This unusual structure may be on its way to becoming a cultural landmark in Toronto.

An antique cemetery in New York, this land is home to any number of famed corpses.

Underground monastery and fortress.