Mengen
Mengen lies in the wooded valleys east of Bolu, among streams flowing toward the Black Sea. The district entered the Ottoman sphere during the early expansion into northwestern Anatolia, a conquest local tradition associates with the commander Konur Alp. The geographer Kâtip Çelebi mentioned Mengen and nearby Gökçesu in his account of the Bolu region. Forests and mountain roads link its settlements to Gerede, Bartın and the inland towns.