Hi Ahmed, there is a nature reserve near a town/village called Omana. It is called "Valley of the horses" thousands of them. It's up in the Taurus mountains and is beautiful. From the Antalya to Alanya main road you turn onto the Konya road, and as you get up into the mountains you make a left turn for Omana. You would need to have a look on Google Earth to see exactly where to turn off.
If you like horses you will like Feyzullah Tunc picture work with the horsemen of Turkey and the feral horses of Turkish region of Anatolia near Kayseri . I found an English paper who used his work to show (worth a look on link)