Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Atop this library is one of the most beautiful green spaces in Warsaw.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

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

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

The library's graceful rotunda is like a bibliophile's temple.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

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

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

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A particularly disconcerting tribute to Irish martyrs.