The village that was founded as a blessed person called Kırklar Sultan settled here a hundred years before the conquest of Istanbul may aptly be called the water town.
The most famous of these is the Karakulak Water. Karakulak Ahmed Aga buys the land from which the water emerges because it cures his stomach and builds a fountain, thus making the water famous. It becomes so famous that it is sold to France, Egypt and Syria in demijohns. Osman, Sırmakeş, Seyit, Kirazlı, Kırklar, Hamam Deresi, Şifa, Özenoğlu, Dermal, Beyazpınar and Müezzinoğlu waters that emerge in Deli Köy are waters as famous as Karakulak.
The village houses the Hamam River, Öküz River, Taşlıgeçit, Toygar and Ayı rivers. Moreover, the village is famous for its string beans, jam roses and walnuts. The linden, chestnut and pine honeys of Dereseki were the favorite honeys in Istanbul. Although very few, beekeeping is still active in the village.