A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

Hot springs monkey spa in the middle of Hell's Valley.

The difficulty of getting a good night's sleep is an age-old affliction according to the one-of-a-kind Snoring Museum.

This delightful little museum is dedicated to only one thing: pasta.

This collection of Japanese luck idols beckons visitors with over 2,000 waving paws.

A collection of noses tucked inside an art museum reveals how times have changed.

An encyclopedic collection of mammal penises.

This Chinese museum proves that it's a watermelon world, we're all just living in it.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

A showcase of canine neckwear spanning five centuries of doggie fashion and function.

A museum dedicated to a Cold War era sausage.

More than 5,000 contemporary and "historic" mustards from around the world.

This collection of grinning ephemera has grown from basement to Brooklyn.

A master plumber has turned his love of art and toilets into a folk museum that's not taking the piss.

A fascinating little museum dedicated to the thousands of chemical substances concealed in our food.

This Cheshire museum has cuckoo clocks, a rare pipe organ and vintage motorbikes. But mostly cuckoo clocks.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

The humble horn finally finds a place in the sun.

Thousands of lawn gnomes have infested this Australian roundabout.

This collection of hand fans doubles as a history of femininity.

A comprehensive collection of Pez dispensers.

A museum dedicated to the silliest fruit.

An homage to the humble watering can.