Google Earth - Ancient Places Built in Rock.

I love Google Earth and they put together some very interesting tours.

https://earth.google.com/web/@3.5764321,98.6766427,27.23845729a,500d,35y,233.4334625h,0t,0r/data=CjASLhIgODE5MmZiYTZiNGY5MTFlN2IzMjNiZDFkZjJkYTAyZjgiCmdjc19saXN0XzA