This semi-secret storybook hedge maze is also the oldest garden in the city.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

One of the oldest, well-preserved water treatment facilities in all of Europe.

A massive, abstract lookout tower providing a panoramic view of Prague.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

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

Looming communist pillar with a Czech twist.

A saintly relic hidden in a Prague church basement.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

This artificial cave looks like something out of a fairytale.

This doorless 20th-century elevator doesn't stop or slow down.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

The first museum in the world devoted to sexual gadgetry.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Countless grotesque faces stare out from this eerie Prague art wall.

A Jenga-style cylindrical tower of books that appears to go on forever.

Underwater restaurant at the coral reefs of Eilat.

This ancient village is peopled by a religious minority and is still using some of the same materials it was built with thousands of years ago.

A secluded fortress from the days of the Crusades that offers breathtaking views.

An autonomous community living in the southern Negev desert.