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

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

One man's remarkable private collection of art from around the world.

One of the smallest bookstores on the planet.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.

Elaborate tile work in this railway station tells the story of Portugal.

Ancient catacombs form the foundation for this Rococo orgy of a church.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The stunning interior of this Gothic church is covered in ornate gold details.

The world's oldest bookshop still in operation.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

A surreal statue honoring Prague's favorite literary son.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

The world's oldest known salt mine.

The topiary maze at the Habsburg hunting lodge.

Marked by the hand of the explorer Henry Morton Stanley.

Long before air conditioning, Persian architects found an ingenious way to cool off.

A historic trade hub teeming with gorgeous architecture, colorful goods, and vibrant designs.

Named after a legendary garden called Eram in southern Arabia, built by order of Shaddad, an Arab king who wanted to compete with Paradise.