The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The underground sanctuary of a mysterious ancient cult.

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

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

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

This tiny church is one of England's smallest.

A former Victorian swimming pool is now a tranquil and secluded park.

Believed to be inspired by the Trevi Fountain in Rome.

This impressive Gothic church dates back to 1244 and stands on the site of one of the first churches in Scotland.

From amidst her whirling waves, this mermaid sees all who pass through St. Swithun’s Church. If local legends are to be believed, she serves as a warning.

The walls of this village church are decorated by two unique religious works of art.

Home of the infamous Cauld Lad of Hylton and one of the inspirations behind "Alice" in Sunderland.

This Georgian mansion blends historical significance with an impressive art collection within picturesque surroundings.

This is the site of the medieval holy well of St. Chad.

The door of St. Lawrence’s Church features small scars from a battle that took place nearly 400 years ago.

One of the oldest Augustinian houses, this church is reminiscent of the rich history of England.

A collection of windows created by two of the foremost leaders in the British Arts and Crafts Movement.

Once the site of medieval pilgrimage for its healing powers, this well was lost and later rediscovered.

According to local legend, this church was built with two doors, so that residents of two rival villages had their own entrances.

This miraculous well is said to heal the sick, grant wishes, and tell the future.

A pirate is laid to rest at St. Nicholas Church.

An 18th-century religious argument etched into stone.