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

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

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

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

These unusual rooms on wheels are holdovers from the 1960s.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Where pardoned turkeys once spent their all-too-brief final days.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A former major munitions plant that has been converted into a sprawling art space.

This pun was simply waiting to come to life, and one defense contractor made it so.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

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

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Exact replica of the ancient monument, but much, much lighter.

The god of wine stares out at passersby on this busy Pittsburgh thoroughfare.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.