This resort in Ukraine combines two late Soviet architectural trends: Constructing things off the ground, and buildings that look slightly like UFOs.
Another memorial was built in Bosnia by the same sculptor who designed Croatia's, with segments meant to symbolise light and darkness.
In St. Petersburg, the Russian State Scientific Center for Robotics and Technical Cybernetics looks a bit like some sort of Satanist temple.
In Chisinau, Moldova, this ugly 1981 circus is now completely abandoned.
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.
This radio building in Bratislava, Slovakia, took 16 years to build — mostly because it's basically upside down.
Bulgaria's Shumen monument, built in 1981, is a strange and enormous concrete sculpture dedicated to the country's history, with cubist figures hundreds of feet high dotted around.
The Makedonium is a memorial built in the 1970s to commemorate a revolt against Ottoman rule in the early 1900s, and it's pretty bizarre.
The Forum Hotel in Krakow, Poland, is another example of how 1970s communist architects simply couldn't resist lifting ugly buildings off the ground.
The enormous UFO-like spiritual home of the Bulgarian communist party stands on a peak in Buzludzha, a mountainous part of the country.