There are several good examples of mosque architecture in Safranbolu, but this one is regarded as the most interesting.
Built in 1661, this squat mosque, with its helmet-roof, has a rather beautiful interior, which is well worth popping your head in as you walk past. In the courtyard, you'll see a metal sundial, which was added in the 19th century.
The alleyways around the mosque are lined with great little boutiques that beg to be browsed, as well as sweet shops, where vendors hand out samples of lokum (Turkish delight).