25. U.N. Buffer Zone, Cyprus

During the rising civil war between the Turkish and Greek residents in Cyprus, the UN took control and created a "Buffer Zone" in the capital to separate the communities. After they agreed on a ceasefire, this no-mans-land became a ghost town, and everything was frozen in time. 

This is the last divided capital in Europe, and people abandoned whatever was inside those walls. It would be interesting if they made it a historical site, but that won't happen anytime soon.