How did Uzunkum become a lovely sandy-beach park in Turkey?

Context: Uzunkum Nature Park is a nature park declared coastal area in Kocaeli Province, northwestern Turkey. Uzunkum, literally long sandy beach, is located at Black Sea east of Cebeci village in Kandıra district of Kocaeli Province. The area was declared a nature park by the Ministry of Environment and Forest in 2014. The nature park consists of the parts, the sandy beach in the north and forested hillside. It covers an area of 235 ha.

Answer: Uzunkum was designated as a nature park in 2014 by Turkey's Ministry of Environment and Forest.