A mysterious charred grand piano appeared on a Biscayne Bay sandbar near Miami, Florida last week – and nobody knows who put it there. Authorities suspect that it was a some sort of elaborate prank. The sandbar is high enough that the piano never submerges, even during the highest tides.

The strangest part is that neither the Coast Guard nor the local fire department have the authority to remove the instrument. It could potentially end up staying right where it is.