Reliken

The legend goes, Cthulhu attacked the elders on earth. The servants of the elders pronounced a curse that forbade the great elders from dwelling under the stars. Cthulhu went into hibernation in R'lyeh to await the time when his servants would awaken him. R'lyeh sank to the bottom of the sea and his mental powers lost their grip on humanity. Sometimes he tries to summon people and awaken. But in vain because no one knows where R'lyeh is. Your old history professor has contacted you to ask for your help. On his latest trip, he found a fabled statue said to possess infinite knowledge. After he returned, he noticed evil cultists following him and therefore decided to go underground. Can you figure out where the professor has hidden the statue?