Kogaionon is a significant archaeological site located in the Romania region of Transylvania. It is believed to have been a sacred mountain and a center for the Dacian civilization, which thrived before the Roman conquest. The site features ancient fortifications, temples, and various artifacts that provide insight into the spiritual and social practices of the Dacians. The name "Kogaionon" is often associated with the Dacian god Zalmoxis, who was considered a deity of the afterlife and wisdom. The site is characterized by its unique rock formations and strategic location, which likely served both religious and defensive purposes for the Dacians.