A museum dedicated to the history and art of staying clean.

The only parking meter in the entire town, it is surrounded by 100 free spaces.

The largest drain hole in the world.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Where beautiful signs live on forever.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Experience a charming 1930's version of "infotainment."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The world's longest known cave system.

First LEED-certified gas station in the United States.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A psychedelic labyrinth on the San Francisco bay.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A 30-acre garden inspired by the principles of modern physics.

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

These fantastically named natural pools look like something out of a Scottish myth.

Elevated freight railway turned wildly successful urban park.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.