Strange sounds from the "Bremen hole"

Recorded by Cities and Memory. The "Bremen hole" is a tribute to the famous story by the Brothers Grimm, "The Town Musicians of Bremen", which involves a donkey, a dog, a cat and a rooster teaming up to ward off a band of robbers. Putting a coin into this manhole cover-like device triggers off a sound show of all four animals - a surprising sonic tourist attraction in the centre of the city!