From Wikipedia:
Hartashen Megalithic Avenue is a column of prehistoric megalithic rocks in Armenia. There are two columns of megalithic rocks which do not intersect and there is no road connection to this site.
Armenian academics have proposed that the megalith formation was built around 7000-5000 BC.[citation needed] There are two rows of basalt stones which are placed at an angle, and in each row menhirs are arranged in three rows.
There is no clarity about the purpose of these two column of menhirs and further research is under progress.