A huge wooden clock that is so beautiful its creator was forcibly blinded.

Boats must transform into railroad cars to navigate this Polish canal.

The site of the first battle of World War II.

Warsaw's fantastically preserved gasworks...almost.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

This man-made mound monument was built out of soil from all across the Polish empire.

A 20th-century picture show in 3-D.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Living towers made of people that are now recognized by UNESCO.

The streets of a sleepy Spanish town proudly exhibit some of the world's finest graffiti.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

These striking ruins of a castle resemble a ship's stern.

Vibrant street art created with mixed media.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A living art gallery painted on a canvas of Monterey pine trees.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

A temple to modernity, tucked away amid Barcelona's more well known museums.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

The world's largest wooden structure.