“Well nooo  DUHHHH!???”

Discovery Channel – Stonehenge was built as a dance arena for prehistoric “samba-style” raves, according to a study of the acoustics of the 5,000-year-old stone circle. . . Rupert Till, an expert in acoustics and music technology at Huddersfield University in northern England, discovered that Stonehenge’s megaliths reflect sound perfectly, making the stone circle an ideal setting for listening to repetitive trance rhythms.