Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

This mosaic-covered bar is brimming with curated curios.

Less a museum than a bizarre fantasy world created by artists and engineers.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

One of two giant blue cockerel statues erected with an intentional double meaning.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

Museum of stuffed gophers set up in various scenes.

A small burial plot formerly stranded in the middle of a road.

Millions of dollars worth of sculpture decorate this Iowa city center.

A bizarre house filled with an astounding array of collections.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

A luxuriant botanical garden below sea level.

The celebrated eyesore created by starry-eyed sweethearts.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

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

Pilgrimage site for star-crossed lovers.

Go inside to really appreciate this 500-year-old technological masterpiece.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

An exotic wildlife habitat right off The Strip.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.