There is a holiday in Iceland called Culture Day (can never remember the Icelandic), on which they celebrate their culture.

The main streets are closed the bars are open, lots of music, the museums have free entry and open late ... it is a very nice evening.

And to finish it off they have a big fireworks display. It was awesome.

doing the count the time from flash to bang, we were about 1km from the centre of the fireworks, but for the big ones we could still feel the shock wave, that is how big they were. It was most awesome.