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Photo: Boby Dimitrov from Sofia, Bulgaria, CC BY-SA 2.0 via Wikimedia Commons
An obelisk built by the Russians.
The Russian Monument is a monument in Sofia, the capital of Bulgaria. The first monument to be built in the capital of the newly liberated Principality of Bulgaria, it was unveiled on 29 June 1882 and is located on the road which Osman Nuri Paşa used to flee from Sofia to Pernik on 22 December 1877.
© OpenStreetMap contributors
Half tour, half experience. Walk around a house setup like an old communist flat from the 1980s. You're allowed to touch and play with just about anything. There's an audio guide in English, Spanish and Bulgarian.
The biggest congress center in the Balkans (a massive monolithic communist-style building). If asking for directions, ask for NDK (en-de-ka), as most Bulgarians refer to it by this acronym.