A modernist landscape of water and sci-fi concrete.

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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

Where manatees are the snowbird vacationers in these balmy Florida springs.

A beautiful geyser under environmental threat.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

The first declared National Monument in the United States.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The final resting place of New Orleans' most famous voodoo priestess.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A snapshot of the city's fascinating voodoo culture.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Curios, scientific antiques, oddities for sale.

Inside this casino, visitors are treated to slot machines and a rare German Christmas pyramid.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.