About 10 kilometers north of Safranbolu, this cave system runs for six kilometers into the Gürleyik Hills, though you can only explore 500 meters of it.
Stalactites and stalagmites are all along the way, and a trip here is an interesting diversion from looking at Ottoman architecture. The caves can get very busy with local school groups from May to September.
If you're traveling during this period, try to get here early in the day, as the first coach loads don't tend to arrive until after 10.30am.
