It is 42 km from Bolu in the Western Black Sea Region. The National Park, located in the south of Zonguldak in the north, can be reached by roads separating from Yeniçağa at the 152nd km of the Ankara-Istanbul highway and from Bolu at the 190th km.
Since the Bolu–Yedigöller route is closed (with snow) in winter, transportation is via Yeniçağa–Mengen–Yazıcık or Devrek- Yazıcık.
Yedigöller Basin, 1642 hectares in size, was taken under protection as a national park in 1965. The basin is formed as a result of the sliding masses blocking the valleys,
connected to each other by surface and underground flows, 1500 m from north to south. It consists of 7 lakes arranged in a distance. Among the remains of the new Byzantine period in the "Koyyeri" location in the national park,
It is understood that the region was a settlement in ancient times.