The final resting place of one of Thomas Jefferson's formerly enslaved sons.

A largely forgotten and touching neoclassical marble fountain overlooking a bear mound effigy.

Built in 1931, this small passageway is believed to be the first modern skyway.

This statue of Olympic hockey coach Herb Brooks immortalizes one of the greatest moments in American sports history.

It was once the base for a series of domestic terror attacks.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

This enormous World War II relic is one of the largest wooden structures in the world.

One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

Chicago was once a major hub of film production, but being silent film you don’t hear much about it.

One of the last functioning antique elevators in Chicago.

Chicago's North Park Village was once the largest municipal sanatorium in the country.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

This dramatic rail curve was once the target of a failed Nazi attack.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

The Bong-area park police have asked visitors to please, stop stealing the signs.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

The last street in Pittsburgh that's paved with wood.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.