The Seljuk Han in Anatolia has tons of information about and pictures of the caravanserai, inns for caravans, built by the Seljuk Sultanate of Rûm in what is now Turkey. The Seljuk caravanserai, called hans, were a vital resource for trade from the middle ages to recent times. The website, by Katherine Branning, explains what a han is, their origins, their function in trade, what life there was like and much more. The site also features 39 individual hans, such as the Kadin Han, now a furniture store, Dibi Delik Han, which is undergoing restoration, Zazadin Han, which has been restored already, and the spectacular Sultan Han Kayseri. For an academic survey of Seljuk hans, here's Ayşıl Tükel Yavuz' The concepts that shape Anatolian Seljuq caravanserais [pdf, automatic download].