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

This 13th century Gothic brick castle is the largest in the world by surface area.

Real bones which are said to have belonged to a Polish dragon.

This is what trains will look like after the zombie apocalypse.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

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

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

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

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

Warsaw's fantastically preserved gasworks...almost.

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

This antique thermometer honors the creator of the first universal temperature scale.

Modern art commemorates one of the first military actions of World War II.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

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

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

The site of the first battle of World War II.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Commonly acknowledged as the only public monument to the Devil himself.

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

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.