Black Sea Turkey (Turkish: Karadeniz Bölgesi) in northern Turkey, is a humid and verdant region renowned for its natural beauty thanks to the high precipitation levels distributed evenly throughout the year. The region is very mountainous and is heavily forested, while the highest parts of the mountains are covered with alpine meadows, glacier lakes, and glaciers.
It occupies much of the country's northern (Black Sea) coast, while the rest of it is part of Marmara Region.
Eastern Karadeniz — This region boasts astounding natural beauty, colorfully dressed Hemşin women, many Georgian ruins hidden in the mountains, and perhaps the world's most spectacularly situated monastery.
Central Karadeniz — Central Karadeniz is home to the Turkish Black Sea coast's largest city, Samsun, beautiful riverside Ottoman architecture in Amasya, and Hittite ruins galore.
Western Karadeniz — The western third of Turkey's Black Sea coast is its most remote and beautiful (having been spared the indignities of the coastal highway), home to the ancient fortified port city of Sinop, and the beautiful resort town of Amasra.
Sümela — stunning monastery hanging on a cliff in the lush Altındere Valley
The 350 km road from Amasra to Sinop is beautiful and breathtaking as it winds it's way along the rugged coast. If you are depending on public transport, however, it is likely to take two days. Expect to spend a night in one of the small towns along the coast, such as Inebolu, as bus service is town-to-town, and you are likely to arrive at some town after the last dolmus has left. While the towns along the way are unspoilt and unpretentious, they are a bit run down. If you have your own car or motorcycle, you can do the journey in one day (start early).
As the Black Sea Region spreads over most of northern Turkey elongatedly, getting out of region involves heading for destinations hugely different in character:
To west, Marmara Region with some of the country's greatest cities, packed full of historical sights.
To south, you have two inland options depending on where you cross over the coastal mountain range—wide open steppes of Central Anatolia or mountainous territory of Eastern Anatolia.
To east, Georgia with its as lush topography as Black Sea Turkey, and its great culinary tradition.
To north, it's usually possible to catch a ferry across the Black Sea to Russian Riviera.