These markers are used to document elevation changes around the famed dam.

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

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

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

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

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

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

This massive home was constructed by one of the greatest conservationists in Colorado history.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

One man's ambition created this psychedelic log home.

At the time of its completion, it was the tallest dam in the world.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This spectacular track has run continuously since 1882.

A hotel with a rich Wild West history of miners and bootleggers.