An eerie phenomenon of the dunes, a rare booming sound that comes from sand flowing down the slip face of a high dune or drift. </p><p> There are legends that describe it as the toiling of bells underground in a sand drowned monastery.
An eerie phenomenon of the dunes, a rare booming sound that comes from sand flowing down the slip face of a high dune or drift. </p><p> There are legends that describe it as the toiling of bells underground in a sand drowned monastery.