Wianki is a Midsummer Solstice Festival involving primarily the launching of wreaths of flowers into water. It is an ancient Polish pagan rite connected with fertility, ritual purification, and fortune telling. The manner in which a wreath floats on the lake, down the river or stream is believed to foretell which girl will soon be married. Wianki takes place all over Poland during the Kupala Night (Noc Kupały) celebrations on the 23rd June each year.
Wianki is also the name of a well-known annual event, which takes place near Wawel Hill in Krakow. The event in Krakow is a large commercial festival with music, fireworks, bonfire jumping, and, of course, the floating of wreaths down the Wisła river.