Sweden's "good old days" painstakingly re-created in a model village.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Op-art architecture designed for happiness.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

The personal charnel house of Anton Bruckner.

The world's oldest bookshop still in operation.

These rock drawings in the Côa Valley also create an ancient optical illusion.

Houses are tucked between, on, and underneath giant boulders.

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

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

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

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.