This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

A spooky defunct railroad tunnel now part of a sprawling trail.

The watery grave of an impractical idea.

This giant green head remembers one of America's jazz giants.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

This historic railroad hotel built from Kansas limestone was once the most popular hotels for traveling salesmen in the midwest.

Discover the story of a man, a dog, and a plan to turn a decommissioned Atlas F Missile Base into an underground resort.

Copenhagen's celebrated theme park and gardens.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

This sublime architectural marvel is a rare example of an expressionist church.

A rococo room covered entirely in porcelain originally constructed for another royal residence.

This medieval city gate is now a blend of the past and the modern world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

A blooming house of worship for the masses.

The history of this futuristic crypt-turned-temple is as curious as its facade.

Although it has never been a secret ninja base, this shrine still has plenty of tricks up its sleeve.

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

This hidden gem in Arizona is truly worth the rugged journey.

This tiny chapel atop a sea stack is dedicated to the patron saint of Ponza, Saint Silverius.

This crescent-shaped beach is said to glow under the light of a full moon.

This abandoned semaphore station hearkens back to the days of the optical telegraph.

These artificial caves crafted by ancient Romans were elaborate fish farms for moray eels.

A founding document of the European Union was written on an island where Roman emperors once banished women.