Matera

The Sassi and the Park of the Rupestrian Churches of Matera

This is the most outstanding, intact example of a troglodyte settlement in the Mediterranean region, perfectly adapted to its terrain and ecosystem. The first inhabited zone dates from the Palaeolithic, while later settlements illustrate a number of significant stages in human history. Matera is in the southern region of Basilicata.

http://whc.unesco.org/en/list/670/