The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Seven flags adorn this Texas museum, one for each of the powers that have ruled the area.

When you can afford only half a road, you build only half a road.

A mere dot on the map in the great north woods is the first place in America to vote in Presidential elections.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Where Elvis Presley received his first Army buzz cut.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

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 tiny but mighty little pumper sits in the middle of the street, waiting for the next big oil strike.

Thousands of small machines line the shelves of this personal collection which definitely delivers on its name.

Circus cemetery for all the “showmen under God’s big top.”

The world's tallest statue of an American hero.

A monument celebrating the idea of reaching inaccessible places.

A luxuriant botanical garden below sea level.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

Step back in time at this immersive historical village.

The site of a gold-digging conquistador's bloody landing in the Americas.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

Fascinating military history, awe-inspiring wildlife encounters, and endless outdoor adventures draw people to this sprawling park.

This former mining town was named the most toxic town in America.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.