五山送り火/Gozan no Okuribi is a festival where bonfires get set on fire on mountains to make words and shapes.
It’s more commonly known as Daimoji/大文字 which means “big letters”.
It’s the culmination of the O-Bon festival on August 16.
Five giant bonfires are lit on mountains surrounding the city.
The bonfires only last for 30 minutes each but the view is awesome!