This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

This spooky statue sits outside a famous Prague theater.

A series of playful yellow penguins share a serious message about the environment.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

A surreal statue honoring Prague's favorite literary son.

A saintly relic hidden in a Prague church basement.

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.