Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

An unlikely Transcendental Meditation haven in the American Heartland built around the ancient Vedic principles of balance and harmony.

A small burial plot formerly stranded in the middle of a road.

Known as "The Hill of the Little Devils."

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

The city is full of whimsical portals to another world.

The writing studio of an American adventure author, built in the style of a medieval castle.

The highest bridge in America was built for an almost unnervingly small amount of money.

Community owned and operated, this property is home to a diverse set of nudists.

The longest living non-clonal organisms on Earth.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

Singing sand that stands as the final remains of an ancient lake.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This naturally-sourced hot spring is now home to a clothing-optional resort.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A burnt-out motel with priceless Native American artwork in the basement, redeveloped into apartments.

The first declared National Monument in the United States.

This geodesic gallery holds a collection of painted spheres that make traditional canvases look lazy by comparison.

Most-visited and most-photographed slot canyon in the American Southwest.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A toxic ghost town sitting atop a massive coal fire.

A stealthy Apache hideaway that became the haunting site of a mass grave.