A guided exploration of the Ravne tunnels surrounding Bosnian Pyramid of the Sun (1 of 6 in the valley). Visoko, Bosnia, 20 km northwest of capital Sarajevo.
https://www.youtube.com/watch?v=d6knodQrwXY
A guided exploration of the Ravne tunnels surrounding Bosnian Pyramid of the Sun (1 of 6 in the valley). Visoko, Bosnia, 20 km northwest of capital Sarajevo.
https://www.youtube.com/watch?v=d6knodQrwXY