Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

Stroll through a wonderland of stupendous moss-covered trees.

Staves, storm-calling, and of course, necropants.

An Australian lake whose pink hue defies scientific explanation.

Famously misunderstood wonder of the ancient world

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Enormous lake at the bottom of a unique cave system.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A taste of the macabre Tokyo's ritzy shopping district.

The seamy, underground secrets of Portland's criminal past.

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

Two stunning 17th-century libraries and a cabinet of curiosities.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Fine dining in the bizarre world of Lewis Carroll.

This South London cemetery holds the remains of more than 15,000 people.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The world's largest collection of witchcraft regalia.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

This shop specializes in oddities and Victorian-inspired wonders.

An ancient capital city that dates back 3,000 years old and harbors many surprises.