Why Visit
Kocaeli
Kocaeli is the province most Istanbul residents escape to without fully realizing they are leaving the metropolitan area. East of the city, the Gulf of İzmit opens into the Marmara Sea and the landscape changes quickly: dense forest covers the Samanlı Mountains, Sapanca Lake sits in a valley of extraordinary clarity, and the Kartepe ridge rises to nearly 1,700 metres above the gulf. Within 40 kilometres you move from industrial waterfront to alpine meadow.
The other half of the province faces the Black Sea. The Kandıra coast north of İzmit is a string of sheltered coves, layered cliffs and quiet camping beaches like Kerpe and Sardala, while inland the Ballıkayalar and Serindere canyons offer rock climbing and waterfall trekking within easy reach of the city. İzmit itself, known in antiquity as Nicomedia, was an eastern capital of the Roman Empire under Diocletian in the 3rd century AD.
For visitors based in Istanbul, Kocaeli works best as a one or two-day loop: Sapanca Lake and the forest villages of Maşukiye and Kartepe for water and woodland, then the Kandıra coast for the Black Sea. The high-speed train from Istanbul to İzmit takes under an hour and runs frequently, which makes the whole province an easy escape from the city.