Go inside to really appreciate this 500-year-old technological masterpiece.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

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

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

Picturesque intersection of witchcraft and ancient Christianity.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

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

A unique bridge with an equally unique view.

The fairy tale castle of the "fairy-tale king."

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

Macabre astrological automaton clock dating to the late 1400s.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

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

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

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

Of course Salvador Dalí lived in a castle...

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.