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Monsanto is a small rural town located at the foot of a hill with the ruins of Castillo de Monsanto (castle of Monsanto). Such town exist in abundance in Portugal and Spain. But this town is different, because the hill is actually a heap of huge boulders. And so the houses were built using the boulders as walls, there are houses built at the wall, houses built between two boulders, and even houses build under a boulder. The result is a town where many houses are actually cave houses.
The top of the hill with the castle ruins is almost 800m asl. The view is extraordinary, and of great strategic importance. As a result this place was inhabited since prehistoric times. The ruins are from a Templar castle which was destroyed by an explosion in the 19th century.
The summit of the hill also contains the Necropolis of São Miguel. It is located below and around the tiny chapel Capela de São Miguel from the 12th century. But the necropolis is at least 1,000 years older than the chapel. Some of the graves are now inside the chapel, other can be found around, all of them are sarcophagi cut into the massive rock of the hilltop. Additionally there are some freestanding sarcophagi flanking the chapel door. The human shapes carved into the boulders were originally lidded with stone slabs, but nearly all the lids are long gone. And the bodies obviously. There is a total of some 80 known graves.