This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This unusual lava tube spouts seawater during high surf.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

Inside this curiosity shop, visitors can peruse the clown collection or purchase a molar from the mouth of Bigfoot.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This sculptural piece by the artist Tom Otterness doubles as a jungle gym.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

Five mythical trolls have taken up residence in woods and hidden on paths at the Coastal Maine Botanical Gardens.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

Six beautiful wooden giants are hidden around Copenhagen.

The world's only museum devoted to the wonders of fluorescence.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

Stay in a room with a view... of the bottom of the ocean.

An underwater statue of Christ blesses the depths off Key Largo.

A psychedelic labyrinth on the San Francisco bay.

A 9 year-old boy’s elaborate cardboard arcade in his father’s used auto parts store.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

World-famous, Pink's still manages to keep its prized cult fetish status.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

World's largest collection of serial killer artwork and other macabre exhibits.

A common entry point to the Griffith Observatory trail holds its own wonders.

Because there's no place like home.