Remains of ancient plant - Bolivia

At top of one of hills in Bolivia The rests of an ancient factory have been found.

It is the elementary concentrating factory which has been constructed still B.C. We were reached only with its stone basis. We see two drills going to top of a hill. At top of a hill we see tanks.

the Rests of an ancient factory in Bolivia

Drills going to top of a hill

Tanks at top of a hill