Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The record holder for the world’s largest peach.

The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Constructed in the 1920s, this former pencil factory is now an office building.

Cryptic messages embedded in the New York City sidewalk.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Elevated freight railway turned wildly successful urban park.

A toxic ghost town sitting atop a massive coal fire.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

An astounding collection of medical specimens, including bits of President Lincoln.

A former major munitions plant that has been converted into a sprawling art space.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

At 207 feet, one of the world's longest continuous escalators.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Exact replica of the ancient monument, but much, much lighter.

This supermarket is suspended 25 feet above an interstate highway.

In Gloucester, Massachussets, fishermen celebrate a successful year at sea by charging a lubed pole to capture an Italian flag.