It is eatimated that there could
be over 150 underground houses. Depending on their sizes they are called as
underground city with many levels or underground villages. They were excavated
as early as Hittite times and expanded over centuries. Underground cities were
excavated to take temporarily shelter during invasions.
Nature behaved very generous to
ancient people. Because, the soft volcanic ash enabled people to carve several
underground cities with using primitive and simple tools. They had
everthing in these underground cities
like kithchens, churches, food storages,winery, ventilation shafts etc.