Safranbolu is a charming town (south of the Black Sea) with wooden houses, old mosques and a few Turkish baths, among other antique novelties. It gets it's namesake from, well, saffron. Stroll through the bazaar, sample the saffron-infused Turkish Delight, feed the street cats, and take photos galore of this UNESCO World Heritage site. Stay at Kahveciler Konağı, a very quaint hotel in an old building. The staff are more than helpful and the rooms are well designed and cozy. The bathrooms are a bit small, but you're not there for views of the bathroom. Call them for directions as the narrow side street where they are located can be a bit difficult to find.
The town is a few hour bus ride from Istanbul or Ankara.