An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

Walk through Czech history in Prague's largest graveyard.

An unusual round church in London with a Templar past.

A particularly disconcerting tribute to Irish martyrs.

Though they've since been renamed, these two streets hint at Dublin's darker days.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

One of Ireland's most infamous prisons for rebels including men, women and children.

This 50-foot rock formation looked like a face that was once believed to be that of a Native American chief.

Where Cusack's record store from the film "High Fidelity" was located.

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

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

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

One Austrian's singular yard is now preserved as a folk art garden of concrete wonders.

This cave holds a surprisingly colorful variety of geological oddities.

A bizarre house filled with an astounding array of collections.

Illegal drag racing two stories beneath Chicago’s streets.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

This rustic old building is said to be the most photographed barn in America.

A UFO scrapyard in the California desert.

Current docking place of the SS United States, the fastest transatlantic ocean liner.