This awkward aquarium sculpture is one of the strangest statues in Chicago.

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

These abandoned grain silos and tunnels are an urban exploration dream.

This small-town pizzeria won the Hollywood lottery.

An abandoned Depression-era zoo hidden just off the highway.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Ruins of a historic medical facility sits eerily by the water.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

Take an underground boat ride through a former hydraulic raceway that was built in the late 19th century.

A posh members-only club with a literally dramatic history.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Once America's longest-manned military fort, now an abandoned hulk.

New York City's smallest piece of private property.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A grassy pyramid named after a French battle.

This floating sculpture of ice is a poignant reminder of nature's power.

Once the largest public hospital for the mentally ill was also surrounded by controversy.

Where experiments are conducted on all things wood.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

The oldest certified bowling alley in the United States is in the basement of this century-old bar.

The "Skinny House" is made from scrap, salvage, and a neighbor’s kindness.