Vappu, or the First of May celebration in Finland, is something to experience. Vappu in Helsinki kicks off on April 30 (also known as Vappuaatto, or Vappu Eve) with a raucous donning of a graduation cap on a statue that I think the entire country comes out to watch. The celebration continues the next day with a giant picnic in Kaivopuisto, a lovely park near where I stayed. Vappu remains one of my top travel memories. Now updated with tips for planning your trip!