The didgeridoo is a long wind instrument of the aborigines of the North of Australia. It’s made of hardwoods, specially eucalyptus, conical-shaped or cylindrical-shaped. Traditionally, indigenous use the branches of a tree hollowed by termites. They use this instrument in their religious rituals.
I’ve heard sometimes people playing the didgeridoo in the street. It has a very ancient sound, a tribal sound, that could transport you to prehistory.