13 historic monuments, puzzles which are still not solved

Newgrange, Ireland

Despite the fact that the road builders stumbled on the monument in the XVII century, his research began only after nearly three centuries. The excavations eyes opened mound: perfectly round, with an impressive diameter, and older than the Egyptian pyramids. In the center of archaeologists have discovered the tomb. Being there during the solstice, you can see a real celestial phenomenon – a ray of light gradually fills the entire cell. Superstitions Irish say that this place – the entrance to the country of elves and fairies.