This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Where America's first doomsday cult awaited the end of the world.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

This delightful little museum is dedicated to only one thing: pasta.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

Rome's ancient Etruscan rival, now a park full of ruins.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

A fairy tale castle in modern Rome.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

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

Architectural monsters are devouring this palace's every door and window.

Architectureal fantasy quarter of Rome.

The underground sanctuary of a mysterious ancient cult.

An alchemist's "magic door" stands in the middle of a Roman park.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.