The largest self-built castle in the U.S., six decades in the making.

A Bibliophile's Dream.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

An acoustic anomaly with a mysterious cause.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

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

Tiki luxury on Nob Hill.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A legendary speakeasy bookstore returns from the brink.

The curiosities and wonders of pharmacy in a delightful historic building.

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

A modernist landscape of water and sci-fi concrete.

An abandoned castle owned and ignored by Masons carries a cursed history.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A museum dedicated to the alleged Roswell Incident.

The world's longest known cave system.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.