The flint mine

Some 7400 years ago, different generations of Neolithic groups living near what is now Madrid visited the top of a bluff near the confluence of the Rivers Jarama and Henares to obtain flint with which to make tools. To get at this flint they dug thousands of shafts and extracted some 700,000 kg of rock. This rock was worked until being reduced to small blades, which were then transported to wherever their makers lived. Gradually, their activities led to what we now call Casa Montero.