The earliest known map to show America, discovered by accident at a Paris bookshop.

Stalactites and stalagmites in a beautifully lit cave.

Pompeii's less famous neighbor is still revealing her secrets.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Renaissance villa and gardens complete with a tormented colossus.

The underground sanctuary of a mysterious ancient cult.

The middle finger of modernity.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

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

Architectureal fantasy quarter of Rome.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

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

A 16th-century horror show built in a lovely Italian garden.

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

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

These ornate arches show how the course of the River Thames has changed.

The fences outside some of South London's estates are made from recycled World War II stretchers.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A historic hill of tall tales, with one rather special tree.

One of the greatest movie directors of all time lived and worked in this London flat from 1926 to 1939.