From Pinar for the June 2010 RR. This card shows the rock formations of Cappadocia, a UNESCO world heritage site. The formations are called "fairy chimneys" or "hoodoos," created from volcanic eruption followed by water and wind erosion. Early Christians sheltered here from persecution by the Roman Empire, building entire underground cities complete with ventilation chimneys, toilets, food storage rooms, and churches!
The stamp is from May 2010, one of a set of four celebrating Labor and Solidarity Day.