Because of its strategic location, Kocaeli is the city with the most advanced industry after Istanbul. It came to the forefront in the field of industry and commerce, so it is one step behind in the field of tourism. However, it still attracts many visitors with its cultural and historical beauties. We have written general information you need to know about Kocaeli which is one of the most important cities. We wish you good reading for this post, where you can see the English and Turkish versions!