The Citrus Variety Collection at UC Riverside contains two trees of each of the 1,000+ varieties of citrus.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Experience a charming 1930s version of "infotainment."

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

A new kind of theme park for adults off the Las Vegas Strip.

Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

A giant open-air sculpture made of over 200 full-sized boats.

An exotic wildlife habitat right off The Strip.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

This vintage animatronics show is the Vegas version of a walk through the woods.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

10,000 flowered plants bloom in the City of Roses.

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

The abandoned personal amusement park of the King of Pop.

The unbelievably opulent home built for an infamous newspaperman.

A house built from trash known as the poor man's Hearst Castle.

A massive volcanic plug is now a protected area that hosts a number of bird species.

An alley covered with 20 years of bubble gum.