A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

The world's oldest continuously operating record shop has been in Cardiff since 1894.

This pedestrian walkway cuts through a cemetery and over several burial vaults.

The castle still holds traces of the abandoned Roman fort it was built atop.

Recently restored menagerie of Victorian-era beasts.

Avant garde house of Pierre Cardin on the Cote d’Azur.

This mosque was based on Sub-Saharan Islamic architecture and created for the Senegalese Tirailleurs.

Balconies that have a most unusual accent.

This windmill has been grinding pigments for traditional paints for more than 200 years.

Atop this former dutch railway office sits an interstellar work of art.

This historical Netherlands fortress still bears the marks of its single siege.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Life-sized bronze statues of fictional puppet characters.

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

Healing waters from a holy well, previously used by locals for doing laundry.

Statues of a fire-breather, a clown, and a whole performing troupe celebrate Luxembourg's creative side.

This work of art, which took 35 years to complete, has a motorway running through it.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

The tallest church in Mechelen might have been the tallest in the world if not for a lack of funds.

Hidden along this old street in Antwerp is a surreal monument of a bronze arm sprouting four hands.

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.