Photo: İncelemeelemani (CC BY-SA 4.0) · Source Gökgöl Cave
An active stalactite cave 3,350 metres long in the Üzülmez area; it is the cave with the largest visitor area in Türkiye and has an 875-metre walkway.
View on mapZonguldak is Türkiye's hard-coal capital, a province on the Western Black Sea coast that runs from Gökgöl Cave to the Cehennemağzı Caves, and from the mining museum to the Filyos Port. The Devrek walking stick, Karadeniz Ereğli Ottoman strawberry, Çaycuma buffalo yoghurt and Zonguldak zılbıt dish are registered.
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6 places worth seeing in Zonguldak, from historic monuments to natural wonders, grouped by type. Open any of them on the map with a single click.
Photo: İncelemeelemani (CC BY-SA 4.0) · Source An active stalactite cave 3,350 metres long in the Üzülmez area; it is the cave with the largest visitor area in Türkiye and has an 875-metre walkway.
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Photo: Rehber (CC BY-SA 4.0) · Source A district of Zonguldak with an area of 736 km² and 80 km of coastline; it is known for its large ports and the Erdemir plants.
View on mapThree adjoining caves in the ancient Achelon Valley in the centre of Ereğli, also called the Church Cave or Hercules Cave; the first cave has a mosaic floor and apse remains.
View on mapEstablished in 2016 in the Çınartepe neighbourhood, this is Türkiye's first hard-coal mining museum, together with the TTK training-mine gallery.
View on mapThe ancient settlement of Tios, in the town of Filyos in Çaycuma, where the Filyos Port project is being built.
View on mapA district of 953 km²; it is known for the Devrek walking stick, its kiren and its baklava.
View on mapZonguldak is a province of 3,341 km² in the Western Black Sea part of the Black Sea region, on a coast where the mountains plunge straight into the sea. The province is known for its port and its hard-coal mines: Türkiye’s richest hard-coal deposits are here. Coal has shaped the city’s economy and identity for a century, and in recent years its sources of income have begun to diversify.
Foremost among the province’s natural assets is Gökgöl Cave: in the Üzülmez area, at the 4th km of the Zonguldak exit of the Zonguldak–Ankara highway, the cave is 3,350 metres long including its branches; with its 875-metre walkway it is the cave with the largest visitor area in Türkiye, and it contains every kind of dripstone formation, including stalactites, stalagmites, columns and flag-shaped dripstones. The Cehennemağzı Caves in Karadeniz Ereğli, in the ancient Achelon Valley, consist of three adjoining caves; the entrance floor of the first cave is covered with mosaic, and it was used as a place of worship in the early Christian period.
The Zonguldak Mining Museum and Coal Experience Mine, which tells the story of coal, was established in 2016; in the Çınartepe neighbourhood, it consists of a gallery that TTK uses as a training mine and the museum building next to it, and it is Türkiye’s first hard-coal mining museum. The districts of the province are Merkez, Alaplı, Çaycuma, Devrek, Karadeniz Ereğli, Gökçebey, and Kilimli and Kozlu (which became districts in 2012).
Zonguldak has a mild but very wet Black Sea climate; rain falls throughout the year. Averages for 1938–2025 from the Turkish State Meteorological Service:
| Month | Avg. high | Avg. low | Rainfall | Rainy days |
|---|---|---|---|---|
| January | 9.3 °C | 3.6 °C | 139 mm | 18 |
| February | 9.6 °C | 3.6 °C | 100 mm | 16 |
| March | 11.0 °C | 4.7 °C | 98 mm | 15 |
| April | 14.9 °C | 8.1 °C | 66 mm | 12 |
| May | 18.9 °C | 12.2 °C | 55 mm | 11 |
| June | 23.1 °C | 16.0 °C | 74 mm | 9 |
| July | 25.3 °C | 18.1 °C | 68 mm | 7 |
| August | 25.5 °C | 18.3 °C | 79 mm | 7 |
| September | 22.5 °C | 15.5 °C | 103 mm | 8 |
| October | 18.8 °C | 12.3 °C | 147 mm | 12 |
| November | 15.3 °C | 9.0 °C | 140 mm | 14 |
| December | 11.7 °C | 5.8 °C | 154 mm | 17 |
The best time is May to September. The caves can be visited all year round; in the wet seasons, bring a raincoat.
By air: Zonguldak Airport was closed in 2002 after being established in 1999, and re-entered service in 2007; it has an annual capacity of 500,000 passengers and a concrete runway measuring 2,130 × 45 metres.
By road: It lies on the Zonguldak–Ankara highway and the Black Sea coastal road; Alaplı is 58 km from the provincial centre.
Day 1 – Central Zonguldak: The Mining Museum and Coal Experience Mine; Gökgöl Cave in the afternoon.
Day 2 – Karadeniz Ereğli: The Cehennemağzı Caves and the coast; Ottoman strawberries in the evening.
Day 3 – Devrek and Çaycuma: Walking-stick workshops, baklava and kömeci in Devrek; buffalo yoghurt in Çaycuma; the seashore at Filyos.
Zonguldak cuisine has been shaped by its mining tradition. Delicacies with registered geographical indications: Zonguldak zılbıt yemeği, Zonguldak malay yemeği, Devrek beyaz baklavası (Devrek white baklava), Devrek kömeci (cevizli) (walnut-filled kömeci) and Çaycuma manda yoğurdu (Çaycuma buffalo yoghurt). Products: Karadeniz Ereğli Osmanlı çileği (Karadeniz Ereğli Ottoman strawberry).
The Devrek bastonu (Devrek walking stick), Devrek kireni (Devrek kiren) and Elpek bezi (Elpek cloth) have registered geographical indications.
Zonguldak province has 8 districts. Explore the places to visit, local dishes and transport in each one.
A regional dish with a registered geographical indication.
A regional dish with a registered geographical indication.
Baklava with a registered geographical indication.
A pastry with a registered geographical indication.
Yoghurt registered with a geographical indication (designation of origin).
The main stops are Gökgöl Cave, the Cehennemağzı Caves, the Zonguldak Mining Museum, Karadeniz Ereğli and Devrek.
Hard coal, the Devrek walking stick, the Ottoman strawberry and Çaycuma buffalo yoghurt.
It is in the Üzülmez area of Zonguldak, at the 4th km of the Zonguldak exit of the Zonguldak–Ankara highway.
It was established in 2016 and is Türkiye's first hard-coal mining museum.
May to September is the best time; rain falls throughout the year.
The information in this guide has been compiled from and checked against the sources below (last checked: 8 October 2026). If you spot an error, please let us know.