Yedigöller is one of the hidden paradises in Bolu province. Yedigöller basin, which is a place known very well by photographers who are especially fond of autumn landscape photography, consists of 7 lakes, which are connected to each other by superficial and underground flow, which are formed as a result of the sliding masses blocking the valleys, lined up from north to south. The names of these lakes are: Sazlıgöl, İncegöl, Küçükgöl, Deringöl, Büyükgöl, Kurugöl and Seringöl.

It is a town in the province of Bolu. Its area is 1,327 square kilometers and its population is 24,973. Its surface is generally rugged, covered with extensive forests and mountains. There are not many large flat areas. The most important sources of income are fruit growing and animal husbandry. The center of the district is the town of Mudurnu with a population of 3,500.

It is a town in the province of Bolu. Its area is 1532 square kilometers and its population is 20,316. Its surface consists of forested, steep sloping ridges and narrow valleys in between. The main livelihood of the people is livestock and forest products. District Center Göynük is the town with a population of 2.017.

Bolu/Gölcük is one of the unique places in the world that you will always want to come to once you come. Gölcük, hidden in a valley, awaits you with its different beauties in every season. GÖLCÜK is 15 minutes from Bolu and 2 hours from Istanbul and Ankara.