>>290060742
Closest were a camping map. No huge bonfires to scare the witches away.
Usually during Walpurgis night, the witches go to the black sabbath to do mischief with the devil. Usually riding there on a broom or a goat. They also kidnap children and bring them there.
Bonfires are lit to keep them away.
It's also to celebrate that summer is coming, burning the old to celebrate the new. It varies over regions.