The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

Try not to get slimed in Tribeca.

Elevated freight railway turned wildly successful urban park.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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

A celebration of capitalism in Midtown.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

This Great Depression-era creation was once known as the strangest house in the world.

Vintage cars and motorcycles race for glory in a throwback motorsport celebration on the Jersey shore.

These former Cold War launch sites have been preserved for tourists to see where the button might have been pushed.

One of the world's largest model railroads is a mind-boggling achievement.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

These colorful French islands spent a stint bootlegging booze during American Prohibition.

A museum dedicated exclusively to aircraft used in the military.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

Hop on the train and tour an elaborate miniature town made completely of junk (including the train).

One of the oldest train stations still standing in Virginia played a vital role during the Civil War.

The United States Capitol's former columns still stand.