When darkness falls a night, orienteering is an obvious option.
You will be divided into teams of max. five people and you will be provided with compass, accurate map and headlamps.
Checkpoints are made of reflective cylinders. The easiest items gives few points to the accounts, the more difficult items more. There are more records than you can find during the race duration of 60-80 minutes, so there must be a strategy for the ordering of items you expect to find.
It ends with a prize ceremony.