Photos from the more urban end of the spectrum, taken from 49 winners (from among 12,000) submitted to National Geographic.
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The Buzludzha Monument on a 1,441-meter-high peak was built by the Bulgarian communist regime to commemorate events in 1891 when the socialists led by Dimitar Blagoev assembled secretly in the area to form an organized socialist movement. It was opened in 1981. No longer maintained by the Bulgarian government, it has fallen into disuse.
