This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

The commemorative stone column conceals a secret laboratory.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The "I-4 Eyesore" is one man's dream that has stood incomplete for over 20 years

The hall of fame for circus performers.

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

A circus legend leaves an unexpected endowment.

Electrical pylon in the shape of Disney's beloved mouse.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A county library in rural Ohio houses one of the finest mineral collections in the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The largest interactive exhibition in the U.S. exploring human history through the lens of power, punishment, and psychology.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The 28-foot granite map plots the locations of 40 theaters in New York City.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Look closely and you’ll notice that the color changes a third of the way up the tower.

At 207 feet, one of the world's longest continuous escalators.

An overlooked memorial honoring the local Washington residents who died in World War I.