Zonguldak province stretches along the western Black Sea coast with a highly varied landscape: densely forested mountain ridges falling steeply to the sea, coal mining infrastructure visible in every valley, and small fishing towns clinging to the clifftop coast.
The province is also the gateway to the Küre Mountains National Park(shared with Kastamonu) — one of Turkey’s most pristine forest parks with deep canyon systems, highland lakes and minimal visitor infrastructure.
- Region
- Western Black Sea / Coal Coast
- Industrial heritage
- Turkey's coal mining capital — Ottoman-era industry
- Ancient history
- Ereğli — Herakleia Pontika, major Greek Black Sea colony
- Known for
- Coal heritage, Ereğli ruins, Gökgöl cave, Küre Mountains
Ereğli — Herakleia Pontika
Ereğli (ancient Herakleia Pontika) was one of the most important Greek colonies on the Black Sea — founded by Megarian colonists around 560 BC, it grew to become a major city with its own tyrants, coinage and cultural output. The ancient city is largely built over by modern Ereğli, but the spectacular sea cave known as the Aşıklar Mağarası(Lovers’ Cave) — traditionally identified as the entrance to the Underworld (Hades) described in Greek mythology — is accessible by boat from the harbour. The ancient harbour wall foundations are visible underwater.
Zonguldak Coal Heritage
Zonguldak’s coal mines have operated continuously since 1848 — the longest running industrial operation in Turkey. TheZonguldak Maden Müzesi (Mining Museum) tells the story of Turkish coal through machinery, photographs and the accounts of the mining communities. The mine headframes visible throughout the city are a unique industrial landscape. The Kozlu and Kdz. Ereğli mine entrances (some at sea level, some below) were engineering marvels of their era.
Gökgöl Cave
Gökgöl Mağarası, 10 km east of Zonguldak city, is one of the Black Sea region’s most accessible cave systems — a 3.5 km illuminated cave with stalactites, stalagmites, and an underground lake. The cave maintains a constant temperature of 14°C. The main walkable section is 1.1 km with dramatic chambers. Combined with a visit to the Gökgöl waterfall nearby, this makes a half-day excursion from the city.
Black Sea region in pictures
Frequently asked questions
Zonguldak
3By bus from Istanbul (4 hrs, regular services), Ankara (4.5 hrs) or Safranbolu (2 hrs). Zonguldak Airport has limited scheduled service. The coastal road from Istanbul via Sakarya and Düzce is scenic — the Black Sea coast begins properly around Akçakoca (east of Düzce). Ereğli (Herakleia Pontika) is 65 km west of Zonguldak city on the coast road.
Primarily coal mining — Zonguldak is the symbolic centre of Turkish industrial labour history, and the coal miners (madenciler) occupy a special place in Turkish working-class culture. The city is also known for its steep coastal topography, fresh Black Sea fish, and the Devrek district's carved walking-stick craft tradition (devrek bastonu).
Yes — Safranbolu is 90 km south of Zonguldak and easily combined for a weekend trip. Safranbolu's Ottoman houses are a UNESCO World Heritage Site. A suggested route: Zonguldak coastline and Ereğli (first day), Gökgöl cave (morning day 2), then drive to Safranbolu (afternoon day 2).