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Surviving remains in Balı neighbourhood of the historic water supply associated with ancient Herakleia. The site illustrates stone construction and water transport infrastructure. Do not climb on or disturb the remains.
📍 Balı Mahallesi, tarihî su kemerleri çevresi, Karadeniz Ereğli/Zonguldak
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A nature route combining the plateau landscape around Gümeli with its monumental ancient yew. Bölüklü's upland settlement and Gümeli's old-growth woodland form an important natural heritage area. Respect root protection zones and site boundaries.
📍 Gümeli beldesi, Bölüklü Yaylası ve Gümeli ormanları, Alaplı/Zonguldak
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A visitor area combining Çayır village's cave with nearby historic arch bridges. Its surroundings are associated with the region's historic water infrastructure. Confirm current cave access and site conditions before visiting.
📍 Çayır Köyü, mağara ve tarihî köprüler çevresi, Çaycuma/Zonguldak
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The outlet cave of the Kızılelma–Cumayanı underground water system, known for its stream and spacious galleries. Sudden rainfall can cause dangerous flooding; entry requires an experienced specialist team.
📍 Cumayanı mevkii, Çatalağzı çevresi, Kilimli/Zonguldak
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A series of waterfalls along Değirmenağzı Stream in Kozlu. Together with the nearby coastal area, they form one of the district's natural attractions. Stream passages can be slippery and affected by rising water.
📍 Değirmenağzı Deresi, Yahma ve Esenköy çevresi, Kozlu/Zonguldak
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The delta, reed beds and wetlands around the mouth of the Filyos River provide feeding and resting habitats for birds. Observe wildlife without disturbance and respect restricted areas.
📍 Filyos Çayı'nın Karadeniz'e döküldüğü delta ve çevresindeki sulak alanlar, Çaycuma/Zonguldak
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A wooded nature park in the Göldağı area of Zonguldak's central district. It offers an opportunity to observe forest vegetation and plant diversity. Confirm current visitor arrangements before visiting.
📍 Göldağı mevkii, Merkez/Zonguldak
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A natural and cultural site comprising caves and a nearby waterfall within Süleymanbeyler village. Avoid touching or damaging markings in the caves and confirm route and access conditions locally.
📍 Süleymanbeyler Köyü, Göleviç mevkii, Karadeniz Ereğli/Zonguldak
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A natural area known for waterfalls and rocky stream passages within a forested valley. Canyon conditions vary with weather and water levels; visits require suitable equipment and local guidance.
📍 Elvanpazarcık çevresi, Harmankaya Şelaleleri vadisi, Merkez/Zonguldak
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A wooded nature park in Alaplı district. It should not be confused with İncivez neighbourhood in central Zonguldak. Check current access and visitor arrangements before travelling.
📍 İncüvez Çamlığı, Alaplı/Zonguldak
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A series of waterfalls in the forested valley of Kayalıdere Stream. The streambed and canyon route include difficult passages in places and require local guidance and suitable hiking equipment.
📍 Kayalıdere Çayı vadisi, Karadeniz Ereğli/Zonguldak
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A coastal area near Ballıca and Bayat villages, with waterfalls along the stream inland. Access to the shore and waterfalls differs; check road and trail conditions locally before setting out.
📍 Ballıca ve Bayat köyleri çevresi, Kireçlik sahili ve dere vadisi, Karadeniz Ereğli/Zonguldak
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A cave in the Ayiçi area of Gelik, forming part of the underground water system connected to Cumayanı. It contains water-filled galleries and siphons and should not be treated as an ordinary tourist show cave.
📍 Ayiçi, Kızılelma mevkii, Gelik, Kilimli/Zonguldak
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A natural area comprising waterfalls along a stream in Devrek's wooded, rocky landscape. Access routes around Özbağı and Sofular, including stream crossings, can vary with the season.
📍 Madencioğlu mevkii, Özbağı ve Sofular çevresi, Devrek/Zonguldak
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A natural site recorded as Sarı Cave in the Esenköy area of Kozlu. Public access, entrance arrangements and conditions should be confirmed before attempting to enter.
📍 Esenköy Mahallesi, Ereğli–Akçakoca yolu çevresi, Kozlu/Zonguldak

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A historic coastal tunnel linking Fener with the area behind Zonguldak harbour. It is associated with the city's coal transport and industrial heritage. Check whether passage is open before visiting.
📍 Yayla Mahallesi, Fener ve liman arkası arasındaki kıyı hattı, Merkez/Zonguldak