A massive sea stack famous for its appearance in The Goonies.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

The boulder is a landmark, public art, and an icon.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

With a history dating back to Victorian times, this architectural gem is a rare New York tourist haunt worth visiting.

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

This monument is dedicated to Balto, the heroic Alaskan sled dog.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

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

In 2004, a Dave Matthews Band tour bus dumped 800 pounds of waste off a bridge and onto an unsuspecting tour boat below.

Illegal drag racing two stories beneath Chicago’s streets.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

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

This garden boasts a magnificent collection of orchids and a spectacular view of the surrounding valley.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

The freeway that never was.

The world’s oldest active sailing ship.

A couple turned their front yard into an artistic masterpiece.

San Diego's most historic and haunted home.