This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

This elaborate towering structure was once famed for its revolutionary height.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Come for the speed, leave in love with the desert.

There aren't too many operational funiculars around, but Pittsburgh has two!

The final resting place of the great navigator, or maybe his brother.

One of only two commuter aerial tramways in the United States.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

A geological mystery on Camelback Mountain.

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

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Avoid gangster interaction while window-shopping.

A toxic ghost town sitting atop a massive coal fire.

The first American department store, and home to the largest operating musical instrument in the world.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A beautiful geyser under environmental threat.

Strange red rock formations that have been attributed to a higher power for hundreds of years.