Walk the whole Mississippi River!

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

More than five miles of underground passageways.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Enormous lake at the bottom of a unique cave system.

Hear the tales of New York's most notorious criminals.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

North Central Florida's largest flea market and a weekend roadtripper's dream.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

The illuminated falls are a gem in North Cascades National Park.

Come crisp December nights, this fairly plain neighborhood becomes a holiday dream world.

This historic building provides a powerful glimpse into the lives of Japanese Americans forced to relocate during World War II.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

The wild west is still alive and well at this authentic mining town watering hole.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

This zombie-themed restaurant stands out in the heart of corn country.

Massive crater in central Oregon.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

This freshwater spring fills with 10,000 gallons of water per minute.