Engraved out of pallid tuff rock and scorched by the Mediterranean sun, the Sassi form a metropolis complex of primitive residences, many of which are simple grottos placed on the rooftops of other dwellings. A labyrinth of subversive tangles and caves conceals the remnants of ancient times, mesmerizes every visitor and one finds it hard to consider the town was built by men. Summoned to be an exceptional, unharmed exemplar of a troglodyte village in the Mediterranean constituency, the Sassi and the Park of the Rupestrian Churches of Matera have been acknowledged by UNESCO as a heritage left by purportedly the first human populace in Italy.