Until the Soviet period there were many such ponds, which were the city's principal source of water, but they were notorious for spreading disease and were mostly filled in during the 1920s and 1930s.
До советскиот период имало многу такви вирови, кои биле главен извор на вода но биле познати по тоа дека шират болести и повеќето од нив биле исушени во тек на 1920 и 1930.