The Museum Pass pays off fast in Istanbul and on the coast

Türkiye sells regional museum passes (Istanbul, Cappadocia, the Aegean, the Mediterranean) that cover state museums and archaeological sites for a set number of days. In Istanbul, Topkapı Palace plus a couple of other sites already covers the pass price, and it lets you skip the ticket lines. The passes are sold at the sites and online. Note that Hagia Sophia and some mosques are not state museums, so check what's included.