This mountain clearing, created during World War II for an oil pipeline, provides a view of NYC from 40 miles away.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

The largest freshwater lake in the Florida Keys.

This Kansas City studio was home to Walt Disney's first animation business.

This recently restored timepiece has stood all around Kansas City.

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.

This abandoned prison castle has become an imposing gallery of graffiti art.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Community bookshelf of 25-foot-tall book spines.

The 25th President's marble casket can be visited in this classical Ohio tomb.

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

This alley-cum-fan gallery in the ex-Nirvana drummer's hometown holds the world's largest drumsticks.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

Whether his story is true or not, Stiffy Green is the most beloved bulldog in all of Indiana.

Hot Doug's "Hot Dog" Stand.

The palatial McDonald's that inspired Wesley Willis.

A section in the cemetery mostly for circus performers, including victims of the famous 1918 Hammond Circus train wreck.

A memorial dedicated to a traveling circus elephant killed by a lightning strike in 1972.

Burial site of the notorious Chicago gangster.

The first home and studio that belonged to the famous architect.

A 30-foot-tall goat tower in central Illinois is home to a herd of Swiss ungulates.

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