The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The cruel trial of a 13-year-old boy inspired the creation of this now abandoned reformatory.

This tower was once used to create ammunition for early settlers.

This metal disk commemorates the birth of a historic American holiday.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The oldest living tree in Manhattan comes shrouded in sinister legend.

A popular European tradition makes its way to the states on one of America's most famous bridges.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

The smallest post office in the United States is no bigger than a broom closet.

These former theme park figures have a new lease on life outside a water plant-turned-restaurant.

Fragments of a massive unfinished sculpture sit near the main quad of the University of Illinois.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

This private residence was the template for one of the most beloved television homes of all time.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

An overgrown collection of miniature buildings still stand as evidence of one couple's obsession with The King.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.

These boots are made for selfies.

The first statue of Christ sleeping on a bench in the United States confused its affluent parish.