Legendary site where an evil bishop was devoured by rodents.

Hilltop monument to the victory of a new nation in the Franco-Prussian War.

This marvelous array is one of the largest collections of mechanical instruments in Europe.

The (fictional) address of Sweeney Todd's bloody barbershop.

An unusual round church in London with a Templar past.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The commemorative stone column conceals a secret laboratory.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

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

Water and windows define this defensive Italian well.

Nine caves filled with recently-discovered archaeological finds under the houses and the streets of the most ancient district of an old town.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

The gardens and chambers of this Moorish citadel conjure memories of the Alhambra.

This Moorish fortress has guarded Málaga from the slopes of Gibralfaro hill for nearly a thousand years.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.