The Australian edition of the popular scientific geographic magazine National Geographic compiled a list of the most ancient observatories in the world.
“Three thousand miles east of the Portuguese Cromlech (megalithic complex dating back at the Neolithic) is the Armenian Stonehenge. It is located near the city of Sisian and includes 223 stones, some of which weigh up to 10 tons. Some stones have round holes.”
National Geographic also included Stonehenge in Wiltshire (England), the ruins of the Chichen Itza Observatory on the Yucatán Peninsula (Mexico), the Meteora Monastery in Greece, the ruins of Alamut Castle in Iran, and Owens Valley in California.
Karahunj is one of the oldest megalithic structures in the world. Two-meter-long pointed blocks stretch from the south to the north, forming a circle in its center. It is proven that the complex was used as an observatory. Top Ancient Sites for Stargazing