MORE DEAD MEN’S SECRETS – Jonathan Gray

A   MORE SURPRISING SECRETS OF THE LOST RACES. Micro technology, ancient musical instruments, undersea tunnel, mystery on Mars, power drills, cement too strong to break, valleys of poison, lost Australian city, taxis with meters, Egyptian caves in the Grand Canyon, drowned cities, ancient bullets, the Labyrinth, Black Knight satellite, Chinese fleet burned up, automatic doors, Atlantis, and numerous other ancient mysteries - alchemy, magic mirrors, lights over pyramids, and so on.