Matera is the only place we visited outside of Apulia/Puglia. Located south of Bari and Polignano in the region of Basilicata, Matera sits on the side of a canyon and features centuries-old cave dwellings and stone houses called sassi (which means "stones"). In recent years, it became the location for much of the filming of Mel Gibson's movie The Passion Of The Christ. Matera also includes other attractions such as a cathedral and Rupestrian churches.
Here's a view of Matera, sloping down from the city center:
This large rock can be seen from an overlook in the city center:
Tourists making their way down some stairs, going from the city center to the cave dwellings:
One view of the canyon:
More of the canyon, with the city center in the distance: