The major center of coal production, Zonguldak has developed rapidly after coal had been found here. It is also an important port in the Black Sea.
Zonguldak has very beautiful beaches in Kopuz and Uzunkum, where you may choose one of the tea gardens or restaurants to watch the perfect scene around. If you are a nature-lover photography then you will take plenty of photos. Eregli, 60 kms west of Zonguldak, is located on a hill where a Byzantine castle stands. Eregli has a mythological significance and it is said that near here at Kavakderesi Hercules caught the three-headed dog Cerberus and returned it to Hades, the god of underworld. Cerberus stayed the cave called "Cehennemagzi" (Entrance to Hell) which is located near Kavakderesi outside Eregli. It has fine beaches and is a haven for ships. When passing through do not forget to taste the delicious strawberries of Eregli which are among the best in the world.
Safranbolu, 127 kms southeast of Zonguldak, is like a museum of traditional Turkish architecture. The castle on the hill is a perfect spot for an overall view of the pretty town. The town is renowned, with its traditional houses which are really praiseworthy, especially the Cinci Han and Hamam, Izzet Pasha Mosque and Library, Koprulu Mosque all from the 17th century. You may sit at the cafes which have a special atmosphere and watch the perfect scene in front of you. Safranbolu is also famous for its extra quality "Turkish Delight" (Lokum). Devrek is a green, scenic town, 50 kms southeast. The wooden walking sticks (baston) that are made here are very popular.