The world's longest known cave system.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This is one really big nut.

The largest retailer of seashells in the world.

For 32 years the famous Ringling Bros circus troupe spent winters in this sunny spot in Florida.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

A museum and shop on Bourbon Street located in the French Quarter.

A giant "X" symbolizes the blood spilled from the brutal Juárez drug wars.

A museum dedicated to the alleged Roswell Incident.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

The second largest roadrunner in the world stands 11 feet tall in his West Texas town.

The pit stop from "The Texas Chainsaw Massacre" now serves beef and pork barbecue, not people.

The world's largest squirrel statue clutches a pecan bigger than your head.

World's largest Christmas store.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

The honor of highest point in Michigan was almost given to the wrong peak before this mountain won out by 11 inches.

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