Mid-20th-century architecture is rarely remembered fondly anywhere in the world.
And that's especially true in former communist countries of Europe and Central Asia, where it seems like architects following a passing fad were allowed to do whatever they wanted.
The result was some bizarre and amazing-looking structures, many of which are still standing 25 years after the fall of the Berlin Wall.
Here are some of the weirdest ones.
Mike Bird contributed to this slideshow:
The "Monument to the Revolution" built in Croatia — then Yugoslavia — is an abstract sculpture dedicated to the people of Moslavina during World War II.
This building in Georgia originally housed the Ministry of Highways and almost looks like it has been Photoshopped. It's now occupied by a commercial bank.
The enormous UFO-like spiritual home of the Bulgarian communist party stands on a peak in Buzludzha, a mountainous part of the country.
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