meltwaterfalls:
Was that original line of sites roughly Esfahan - Tabas? with a cluster below in Yazd?
The clear line of orginal T List sites followed Highway 44 just below the Elburz mountains east of Tehran roughly Shahrud to Garmsar
the 3 southerly ones were around Yazd indeed including Maybod and Zein-o-Din which have survived and are likely (with Bisotun) to be among the most commonly visited Caravanserai if done "en passant". Originally there was nothing south or S West of that at all