Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.

These stairs feature the names of Zemun's most famous faces.

This statue of a 15th-century Hungarian military and political figure has become known for its resemblance to a particular cartoon knight.

A small memorial to a deadly night in Serbia that shook the world before it was swept under the rug.

A museum dedicated to the classic Italian scooter in the heart of Serbia.

A subterranean display of public art and architecture.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Double spiral staircases are not unheard of, but they are very rare.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

The only surviving piece of Copenhagen's 16th-century defensive wall.

Swedish skyscraper with a 90° twist.

A museum filled with tiny, adorable versions of the mighty Royal Danish Navy.

Once a meeting point for great thinkers, and the midpoint of the country.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

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

This sublime architectural marvel is a rare example of an expressionist church.

Did he come up with a theory of cosmic-ray showers while sitting in this bath?

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

This zombie-themed restaurant stands out in the heart of corn country.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.