Arkaim: Aryans, Advanced Astronomy and Untold Secrets of a Russian Citadel
Arkaim is a mysterious site located in Russia. Experts believe the citadel, not necessarily the oldest feature of the site, was built between the 17th and 16th century BC. But there are several reasons why Arkaim stands apart from other Bronze Age settlements in the area, leading to the idea it was built by a separate group.
Source: ancient-origins.net