Cappadocia
Subterranean retreat may have sheltered thousands of people in times of trouble.
When the invaders came, Cappadocians knew where to hide: underground, in one of the 250 subterranean safe havens they had carved from pliable volcanic ash rock called tuff.
Now a housing construction project may have unearthed the biggest hiding place ever found in Cappadocia, a region of central Turkey famous for the otherworldly chimney houses, cave churches, and underground cities its residents carved for millennia.