The "Seinfeld" diner.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

A comprehensive collection of Pez dispensers.

An ancient capital city that dates back 3,000 years and harbors many surprises.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

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

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

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

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

This historic hotel invented the chocolate brownie.

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

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

Illegal drag racing two stories beneath Chicago’s streets.

The only Chicago bridgehouse open to the public contains a museum devoted to the Chicago River.

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

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Hidden beneath the streets of London is a secret subway that only carried mail.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

Where beautiful signs live on forever.

This stone is a marker of one millionaire's personal vendetta against gravity.

An ancient Roman temple hidden in the basement of Römerpassage, a modern shopping mall.