A new sculpture calls attention to climate change in the centuries-old city it threatens.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

Where the lovelorn find a home for their sentimental keepsakes.

The house that took a plunge into the facade of a museum.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A statue honors the children who fought Nazis in Poland.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

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

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

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

What might look like a cliffside sacrificial altar at first glance is actually a stone compass pointing to cities and lighthouses all around the world.

Swedish skyscraper with a 90° twist.

Old Danish castle immortalized in Shakespeare's Hamlet.

Once the scene of a young boy's home in revolt, this Norwegian island is now home to the world's first "ecological" prison.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

Tens of thousands of tiny bottles stuffed with various items.

These mysterious circular formations are actually remnants of 19th century gristmills.

This Minsk museum has cat coffee, cat chess, cat art, and even a cat "staff," which visitors are free to take home.

A peat bog in southern Sweden provides a cozy and photogenic home for junked Volvos, Saabs, and the occasional American muscle car.