The house where John Wilkes Booth conspired with his co-conspirators.

With its vaulted ceiling and gilded details, this University of Washington library would feel right at home inside an old palace.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.

This large, castle-like structure is hidden amid the mountains on the grounds of the Utah State Hospital.

These 100-year-old tunnels in downtown Provo house artists, restaurants, and a few surprises.

This expansive bridge in the Canadian wilderness was originally just built for friends.

There’s a hidden military meme engraved on the World War II Memorial.

This monument remembers the first Japanese Americans forcibly relocated during World War II.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

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

Washington's iconic carousel has a nice piece of Civil Rights history.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

Over 75 historically themed murals grace the walls of a small Washington city.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A community gathering place that once housed half-ton tanks and the World's Fair.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

A daily replay of the experiment that proved the rotation of the Earth.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.