China, Jiangsu, Nanjing, Retired couples dancing beneath the Ming city wall at Xuanwu Lake Park, Couples in foreground dancing the tango in a line.

Albania, Kruja, Exterior of stone watchtower at Kruja Castle.

Albania, Kruja, Exterior of stone watchtower at Kruja Castle.

Albania, Kruja, Exterior of stone watchtower at Kruja Castle.

Albania, Kruja, Watchtower at Kruja Castle.

Albania, Kruja. Exterior of stone watch tower at Kruja Castle.

Albania, Kruja. Exterior of stone watch tower at Kruja Castle.

Albania, Kruja. Stone watch tower of Kruja Castle and part ruined walls.

Albania, Kruja, Exterior of stone watch tower at Kruja Castle.

Poland, Krakow, Watch tower of Wawel Castle.

Poland, Krakow, Watch tower of Wawel Castle.

Germany, Bavaria, Munich, Dachau World War II Nazi Concentration Camp Memorial Site, fence with watch tower and reconstructed prisoner barracks.