This hidden Art Nouveau courtyard is an opulent feast for the eyes.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

Where members of the Crossbow Corps of San Marino demonstrate their skills.

This fantastical icy castle is built anew every winter.

This bridge later moonlighted as a local jail.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Successful single-handed, non-stop circumnavigation of the world in a sailing boat was a wish said to be granted at the well.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

Fascinating town where normal life interfaces with the occult.

In the ruins of Glastonbury Abbey lies the alleged resting place of the legendary king.

The oldest working mechanical clock in the world.

This gate served as a small lock-up jail in the 14th century.

A remote gravestone on the moor marks the spot where a teacher's body was found under mysterious circumstances that remain inexplicable.

400-year-old garden, restored to beauty.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

During the heyday of fishing in Hastings, there were more than 100 of these storage facilities.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

This unique Renaissance castle was turned into a home for Nazi occultism.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.