Tilkiler Düdeni) is a cave located in Manavgat district of Antalya in southern Turkey.

It is situated east of Tilkiler village and about 4 km (2.5 mi) northwest of Oymapınar Dam at 150 m (490 ft) above sea level.

[1] Tilkiler Cave was discovered in 1976 during the preparatory construction works at Oymapınar Dam while excavating an injection gallery.

Water level varies between summer and winter ranging between 68 and 128 m (223 and 420 ft).

[2] A few kilometers from the entrance, there is a hall, where the ground is completely covered with sand.