Yumuktepe is a tumulus in Mersin that dates back to 6000 B.C. There are 23 levels to the mound, though there are no existing structures visible above ground. The top of the mound, and a few places along the sides of the tell, have been excavated.
Originally, Yumuktepe was a coastal settlement along the Mediterranean Sea, but the sedimentary deposits left by the Müftü River have slowly moved the coast southwards, where it is now 2.35 km from the site. It was one of the first fortified settlements in the world, where it guarded the southern end of the Cilician Gates (the pass from the Anatolian Plateau to the Mediterranean coast).
Yumuktepe was a part of Kizuwatna a vassal kingdom of Hittite Empire.
If you visit Yumuktepe now days, you will find a great place to have a small picnic and find shade for a restful afternoon. In order to get to the top, you will have to climb a bit, but there are concrete stairs from the bottom to the top. Along the stair route, there are walking paths that go around the mound that can also be used for sitting and picnicking in the shade of the trees that cover the hill.
On the West side of the tell, between it and the Müftü River, there is both a dirt and paved walking/running/biking path that lines the river going all the way down to the sea.
The entrance to Yumuktepe is on the south side of the mound.