There are beautiful ruins all throughout Turkey, completely out in the open. You can walk through a park and find yourself stepping over ancient mosaics and columns, the kinds you'd find behind velvet ropes and glass partitions in Italy or Greece.
One of my dreams is to walk the Lycean Way [0] where I’ve read that the remote trails have you camping among ruins. It seems amazing that there’s still so many ancient ruins just laying about and accessible to humans.
That's a terrific trek. I've only done one small segment, Faralya to Fethiye, and enjoyed it so much I want to return to do the entire length... Some day.
Termessos is one. An ancient Greek city up a mountain. Imagine an amphitheatre with a view in every direction. The burial site is open for you to climb around and over. It's near Antalya. Check it out: https://en.wikipedia.org/wiki/Termessos