Thousand Origami Cranes (千羽鶴 Senbazuru or Zenbazuru?) is a group of one thousand origami paper cranes held together by strings.
An ancient Japanese legend promises that anyone who folds a thousand origami cranes will be granted a wish by a crane, such as long life or recovery from illness or injury. The crane in Japan is one of the mystical or holy beasts (others include the dragon and tortoise), and is said to live for a thousand years. In Asia, it is commonly said that folding 1000 paper origami cranes makes a person’s wish come true. This makes them popular gifts for special friends and family.
(from wikipedia)
seen a bit everywhere, in the streets of porto.