Nimara Cave is on Cennet Island (Paradise Island) in Marmaris. The cave is at 350 metres altitude on the north west slope of island.

The ruins at the highest point of the island prove that it had a strategic importance. The cave is under protection as a first degree archaeological and natural area in 1999. It was opened to visitors on May 18, 2008 along with the path.

The 60 metres wide entrance part of the cave is not original; it is composed of rocks dropping into the cave because of tectonic reasons. Non-high stalagmites appear at the bottom side of it. The high stalactites and stalagmites are rising on the south west of it. It is located at the highest point of Cennet Island on the south west of the ancient settlement. According to the finds, the cave was used as a sacred area. Two women statues that were made of sand have been found in the cave in 1998.

Due to the rescue of the cave, the excavations have been carried out by Marmaris Municipality with the contributions of Marmaris Museum Governorship between 29.07.2007-10.10.2007. As a result of the excavations in the cave, the slotted end of a bone tool which came out at first belonged to the upper palaeolithic period culture of the east Europe.

According to the written sources, the earliest settlements in Marmaris belong to 3000 years BC and go back between 10.000 and 20.000 years BC with the obsidian cutter and drills and their rasping dated back to between 10.000 and 20.000 years BC.

As the works have been completed by Marmaris Museum Governorship and Marmaris Municipality to gain regional and national culture and tourism. A cave walking way was opened to visitors on 18 May 2008.