Megalithic Karahunj is located on a rough plateau near the city of Sisian (area of 7 ha). According to some archaeoastronomers, it is one of the oldest observatories in the world. 

A series of stones standing in a line with holes pierced in them and rock paintings provide evidence of astrological knowledge of the native people. This observatory is estimated to be 3,500 years older than England’s Stonehenge and 3,000 years older than the Egyptian pyramids.

The more plausible the arguments of followers of the megalithic astronomy are, the less spectacular the hypothesis of archeologists from the Institute for Near Eastern Archeology at the University of Munich seems to be. According to these archeologists this ensemble of upright stones is assumed to have been mainly a necropolis from the Middle Bronze Age to the Iron Age because of the massive stone tombs found in this area.