An alley covered with 20 years of bubble gum.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The magic's in the hole!

The seamy, underground secrets of Portland's criminal past.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

A giant Troll lurks under one of Seattle's oldest bridges.

A walk through the historic city center, under the streets of Seattle.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The celebrated eyesore created by starry-eyed sweethearts.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The fairy tale castle of the "fairy-tale king."

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

The world's oldest known salt mine.

An Austrian house of bones filled with hundreds of intricately painted skulls.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Baroque celebration of the end of the Great Plague of Vienna.

The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

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

Synagogue built from the stones of Solomon's temple contains the golem of Prague.