From İstanbul and Ankara there are most buses to arrive Karabük, then you can get on a minibus for the short transfer to historical town ,Safranbolu. In Safranbolu, most probably, you will get off in the modern part of SAFRABOLU, from there buses will leave you to Old Safranbolu . To travel Yörükköy, or İncekaya or Bulak Mencilis inn, There aren’t any public transports ,taxis are cheap enough to travel in Safranbolu