Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Giant topiary dog once played a role in a terrorist bomb plot.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

A historic and beautiful Art Nouveau chamber in a historic railway station.

A saintly relic hidden in a Prague church basement.

This artificial cave looks like something out of a fairytale.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

A display of magnificent stained glass windows is the first exhibit of its kind.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

This historic hotel invented the chocolate brownie.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

In 2004, a Dave Matthews Band tour bus dumped 800 pounds of waste off a bridge and onto an unsuspecting tour boat below.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Honoring the star of the “The Bob Newhart Show” which took place in the city of Chicago in the 1970s.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.