The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

A terrific purveyor of natural history objects and curios.

This blue behemoth of a bear is a colorful homage to Brown University's mascot.

A work of art that pays homage to a Victorian timepiece in Providence.

The stone sculpture of an Ottoman soldier is an homage to a lost Providence landmark.

An unusual library of dead things at the Rhode Island School of Design.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.