Ravana fort in Sri Lanka

Ravana fort in Sirigiya, Sri Lanka said to be from 3rd or 4th millennium BC.

https://www.youtube.com/watch?v=IQZIXZRXmGE
https://www.youtube.com/watch?v=-pyNJ_spwPQ

https://upload.wikimedia.org/wikiped...vana_India.jpg


https://www.greenholidaytravels.com/...Sigiriya_1.jpg

https://www.youtube.com/watch?v=WjvKKoIZH3w
Sigiriya - Felsenfestung mit Wolkenmädchen , Sri Lanka