This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

Stroll through a wonderland of stupendous moss-covered trees.

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

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

When waves crash onto this section of beach, the rocks sing a song.

143 feet of leaping muskie whose mouth can be used as a wedding venue.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

No one knows how many bodies are in this vault in a Chicago public park.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

A Bibliophile's Dream.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Three columns of volcanic rock shoot out of the ocean.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created with the discharge from a geothermal energy plant.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

To find the "unicorns of the deep" you've got to go downstairs.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

A local landmark with generations of spraypainted messages, and more being added each day.