Three Emperors' Corner

Three Emperors' Corner is a former tripoint at the confluence of the Black and White Przemsza rivers, near the towns of Mysłowice, Sosnowiec and Jaworzno in the present-day Silesian Voivodeship of Poland. During the Partitions of Poland, from 1871 to 1918, it marked the place at which the borders of three empires that had divided Poland – the Russian Empire, Austria-Hungary and the German Empire – met.

Source: Wikipedia