The caravanserai of Yingi Imam lies approximately 17 kilometers west of Karaj on the Tehran-Qazvin road. Stylistically, this building dates to the 17th/11th century AH.

The building takes the form of a square with a central courtyard. At the center of the courtyard is a square platform accessed via a short flight of stairs. Four iwans open onto the courtyard at the center of its four sides. The corners of the courtyard are angled, and passageways lead off of these corners onto octagonal domed halls. Between the iwans and the corner passages are three shallow alcoves opening onto three small chambers (making for a total of six on each side of the courtyard). The octagonal domed halls lead onto wide corridors that run behind the aforementioned chambers.

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