Newgrange, Ireland
Despite the fact that road builders ran into the monument in the XVII century, people started to research this mysterious landmark only three centuries later. The excavations showed it was a barrow: perfectly round with an impressive diameter, and older than the Egyptian pyramids. In the middle, archaeologists found a tomb. If you happen to visit Newgrange during the solstice, you can see a real astronomical phenomenon — a ray of light gradually fills the entire room. The Irish superstitions say that this place is the entrance to the country of elves and fairies.
