A Bonfire, lighted by people in kayaks in the Kinda-Kanal next to Tannefors Slussar (a row of locks at the district Tannfors) in Linköping, Sweden.
You can find the majbrasa – a bonfire, traditionally on the Valborgsmässoafton – all over Sweden in the evening of the 30th of april combined with choirs singing special Valborg songs, speeches and the typical „Hipp Hipp – Hurra! Hurra! Hurra! Hurra!'“. There are also a lot of student parties, especially in Uppsala and Lund.
In Linköping, the procedure is very nice. The fire is in the middle of the Kinda-Kanal and gets lighted by people on kayaks. After a speech, a big firework completed the evening.