Here you can find a lot of art bombs http://www.artbomb.nl/search/240/en
Every year, on the 24-th of June, bonfires are lit in France. It is the name day of John the Baptist. The fires are called: ‘Les Feux de Saint Jean’ (the fires of Saint John). This bonfire use to be a common ritual in the countryside. These days there are only a few places left celebrating this old traditional rite.