Turkey travel guide
Explore Kocaeli, a convenient escape near Istanbul offering Marmara and Black Sea coastlines, Kartepe’s mountain scenery, Ballıkayalar Nature Park, museums, beaches, forests and year-round outdoor activities.
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Museums & History
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Submit a Radar report →An industrial heritage museum preserving the former SEKA paper factory. Production machinery, pulp preparation equipment and energy infrastructure explain papermaking and the history of the factory.
📍 Kozluk Mahallesi, Mehmet Ali Kağıtçı Sokak No:77, İzmit/Kocaeli
Museums & History
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Submit a Radar report →A nineteenth-century mansion commissioned by Selim Sırrı Pasha, the governor of Izmit. Its timber-frame structure, separate domestic and reception sections, wall paintings and decorative interiors illustrate Ottoman residential architecture.
📍 Hacı Hasan Mahallesi, Sırrı Paşa Caddesi No:18, İzmit/Kocaeli
Museums & History
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Submit a Radar report →Castle ruins on a small peninsula extending into the sea. Thought to be Byzantine, the site is associated with historic coastal and harbour defences. It is not a managed museum; take account of rocky ground and coastal conditions.
📍 Seyrek kıyısı, kale kalıntıları, Kandıra/Kocaeli
Museums & History
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Submit a Radar report →An early Ottoman bathhouse commissioned by Süleyman Pasha, son of Orhan Gazi. Also known as Yukarı Pazar or Dere Hamamı, the restored building has a double-bath layout. Official visitor information lists it as closed to visitors.
📍 Akçakoca Mahallesi, Orhan Caddesi No:3, İzmit/Kocaeli
Museums & History
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Submit a Radar report →An Ottoman-period tomb on a cypress-lined hill in Örcün. Its wooden cenotaph and surrounding historic graves form part of the area’s religious heritage. Respect the rules of the tomb and cemetery.
📍 Örcün Mahallesi, Sultan Baba Türbesi, Gölcük/Kocaeli
Museums & History
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Submit a Radar report →An early Ottoman monument in Gebze, commissioned by Orhan Gazi. Archival records place the start of construction in the fourteenth century. It is a separate building from Orhan Mosque in Izmit. Respect worship arrangements.
📍 Sultan Orhan Mahallesi, Sultan Orhan Camii, Gebze/Kocaeli
Museums & History
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Submit a Radar report →A historic settlement whose traditional houses, gardens and street pattern preserve traces of rural life. Explore the residential neighborhood on foot while respecting private homes and avoiding entry without permission.
📍 Tavşancıl Mahallesi, tarihî yerleşim merkezi, Dilovası/Kocaeli
Museums & History
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Submit a Radar report →An archaeological area containing burial mounds associated with the Hellenistic and Roman periods, including Aytepe and the Great Tumulus. The official visitor information lists the site as closed. Do not enter burial chambers or protected areas without permission.
📍 Kabaoğlu–Üçtepeler çevresi, eski İstanbul yolu, İzmit/Kocaeli
Museums & History
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Submit a Radar report →An Ottoman bridge on the historic route from Karamürsel towards Iznik. Associated with Kösem Sultan’s charitable works, the cut-stone structure represents seventeenth-century bridge architecture in the region.
📍 Yalakdere çevresi, tarihî Valide Sultan Köprüsü, Karamürsel/Kocaeli
Plan your visit
Kocaeli lies east of Istanbul between the Marmara and Black Sea coasts, offering industrial heritage, forest areas, beaches and winter activities at Kartepe.
Summer suits the coast, spring and autumn suit nature, and winter attracts visitors to Kartepe.
Rail, buses and ferries serve urban districts. A car is useful for Kartepe and the Black Sea coast.
Travel conditions and opening arrangements can change. Check current information before your visit.
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