Esposizione Universale Roma was built by the Fascist dictator Mussolini to celebrate 20 years of Fascism. One of Rome's most chilling yet underrated attractions, the EUR houses works by famous architects like Marcello Piacentini, Giuseppe Pagano Pogatschnig, and Ettore Rossi.
If you do visit, do not miss the Palazzo della Civiltö Italiana, the Fascist answer to the Colosseum.