This monument owes its name to a quote by the famous civil rights activist and journalist.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

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

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

The last remnants of a lakeside airport that was bulldozed overnight by the mayor of Chicago.

Wedged between two sets of row houses is an awkwardly located family graveyard.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

The oldest continuously inhabited street in America.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

The most famous location in China was home to whole dynasties worth of imperial rulers.

The once highest point in China blends symbolic design with a kick of adrenaline.

A prestigious learning institute of old Shanghai.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A massive marble foot is tucked away in a small alley near the Pantheon.

The Pope’s secret escape route.

A Nesting Doll of Churches.

This is the oldest Roman-made bridge in the city still existing in its original state.

This curious, round temple is the oldest still-standing marble building in Rome.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

One woman's Viking Castle on Lake Tahoe.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

One of the greatest boxers and humanitarians to ever live chose his hometown as his final resting place.