Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

A collection of colorful dinosaurs hidden in an actual rainforest.

A promotional sun clock on the site of San Francisco's great raceway.

The hotel room where Janis Joplin tragically died has now become a makeshift shrine to the singer.

A little barn in the middle of the city preserving Hollywood treasures since 1985.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The first and only carousel with a lineup entirely of insects.

A small Richmond island dotted with the remnants of hundreds of years of history.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

A luxuriant botanical garden below sea level.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

20,000 pieces in a Frank Gehry-designed building.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

This amazingly preserved Gold Rush town is a historian's dream.

These abandoned grain silos and tunnels are an urban exploration dream.

This Old Testament garden features 100 plants from biblical times.

Once America's longest-manned military fort, now an abandoned hulk.

Curious cave that stays a cool 56 degrees all year long.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

In the early 1800s, surgery was also a show.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...