Giant, friendly pelicans in Central London, the most unlikely of places.

A naturally mummified 2,000-year-old man.

The final resting place to 300 Victorian-era pets hides inside the city park.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A cluttered and astounding collection of antiquities and curiosities.

Hear the quietest sound from across the dome.

One part local history, 99 parts gruesome haunted house.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The only museum with its curator—and her pets—buried inside.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A Nesting Doll of Churches.

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

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

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

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

The oldest living tree in Manhattan comes shrouded in sinister legend.

The site of the deadly Triangle Shirtwaist Factory Fire.

A terrific purveyor of natural history objects and curios.