This mysterious twin turboprop Grumman G-159 covered in graffiti has spent a decade and a half abandoned.

More than five miles of underground passageways.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

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

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Quite simply the largest tree in the world (by volume).

The "Seinfeld" diner.

The world's longest known cave system.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A beautiful geyser under environmental threat.

The hotel room where Janis Joplin tragically died has now become a makeshift shrine to the singer.

The so-called "Statue of Liberty of Los Angeles" is on a one mutant mission to keep L.A. weird.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

The magic's in the hole!

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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

A giant Troll lurks under one of Seattle's oldest bridges.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

The first singer to cut a country music record is buried in a small graveyard in Atlanta, Georgia.

This stone is a marker of one millionaire's personal vendetta against gravity.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."