If you don’t hire a private guide, you need context.
Availability:
Major sites like Topkapi Palace, Ephessus, and Goreme Open Air Museum have Audio Guide booths at the entrance.
Cost: Usually extra (around 100-200 TL), or sometimes included in the ticket price (check the sign).
Deposit: You must leave your ID or Passport as a deposit to get the device. Don’t forget to pick it back up!
Alternative: Some museums now have QR codes you can scan to listen on your own phone. Bring headphones!