Places KarlPopper Wants to Go

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

These warring psychedelic crags commemorate an unsuccessful military operation.

An exquisite monument dedicated to fallen Partisan soldiers and anti-fascist fighters of Yugoslavia through symbols of gears and flowers.

A scattered cemetery of medieval tombstones, each carved with indivdual patterns and scenes, overlooking a bright blue lake.

Micro-nation based around a nine-story high illegally built tower.

Learn the incredible story of how an unassuming spa town was transformed into one of the world’s largest uranium mining sites.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

A perfect replica of the beloved show's first set.

A memorial commemorating the place where Truman gave the order to deploy the first nuclear bombs on Japan.

A helicopter memorial commemorating what was once the only way to access this West Berlin exclave.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

The solemn exterior conceals an opulent interior of this 17th century church.

An exquisite Baroque church in Vienna's old town.

A silly medieval mural preserved on the side of a Viennese house.

This spa park features an open-air museum of abstract marble sculptures.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

A spherical "micro-nation" in the heart of Vienna.

Apartment complexes built into huge repurposed natural gas tanks.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

Op-art architecture designed for happiness.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The beautiful baroque library of the Hapsburg empire.