Amazon Stonehenge

"Amazon Stonehenge". In 2006, a monument was discovered there - the circle of stones. One hypothesis - the ancient Indian observatory. Mound diameter is 30 meters, it consists of 127 granite stelae up to 4 meters. One of the units aligned for the winter solstice. In the shortest day of the Northern Hemisphere, December 21, the shadow of one of the blocks disappears when the sun is directly above it.