Iraj Castle is located to the north-east of Varamin and near Ja'far Abad in north of Iran.
The huge four-cornered Citadel near the city is known as Citadel of Īraj by locals, Īraj was son of Thraetaona and that improves the city's relation to the ancient Varena.
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Included amongst the significant antiquities of Varamin are the mausoleum of Imamzadeh Yahya built in the 14th century, and the Jameh Mosque of Varamin, from the era of the Ilkhanid Abu Saeed.