Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

Home to Hollywood history and a very special salt crystal.

This private residence was the template for one of the most beloved television homes of all time.

The highest point in Washington state is a volcano covered in glaciers.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

The land is home to swimming ponies and a legendary 18th-century treasure.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

A cave's rare beauty held a cavernous secret hidden underground.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

Mile-long cave system near Great Smoky Mountains.

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

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

Native Americans built this circle of stones, which was used to predict astronomical events.

This impressive tunnel was dug entirely by hand over the course of 36 years.

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

The longest navigable underground river in the United States is home to countless blind and albino animals.

High in the Rockies the third largest statue in the U.S. opens her welcoming arms, and lights up the night sky.

The notorious couple camped at this site after a bloody shootout with police.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

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

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.