How can I explore Istanbul's bath culture over two days?
Use one day for a museum or historic building and another for a treatment. Keep ticketed visits and bathing reservations separate when planning time and cost.

Related questions
How can I combine Sultanahmet sightseeing with a hamam?
Group nearby sights and leave a separate appointment window. For Golden Royal, use the address on Peykhane Sokak rather than a generic “Sultanahmet hamam” map result.
Can I bathe at the Bayezid Hamam Culture Museum?
It is a museum visit, not a treatment reservation. Check current visiting arrangements directly and book a working hamam separately if you want a bath.
Does a Zeyrek bath booking include its museum?
Do not assume it does. Check the operator's current ticket and treatment terms; museum access and bathing can be separate arrangements.