Nothing special. Any other tourist cave will be more beautiful and larger. It's a very crowded place and there's only one room. As a way to "pass the time", for example, while waiting for your tour group, you can, but there is no need to go on purpose, spend money, there is no need.
The cave is not big, but for someone who has never been in caves, it will be interesting. Stalactites, stalagmites and columns are all present. It's nice to go there in the heat, 10-15 minutes, there's nothing else to do there. In August 2024, admission for an adult cost 100 liras, for a child under 7 years old - 30 liras. It is located at the end (or beginning) of Cleopatra beach, under the mountain, where the Alanya fortress is located.
Damlatash Cave is located in the town near the beach. easy to find. There are signs. The cost per person as of July 2023 was 30 liras. The cave itself is small, but everything is done wisely: lighting, stairs, benches to sit on. I personally liked the cave. The air is heavy there: humid + temperature. But they say that it is good for asthmatics and just for the lungs. In general, I advise you