History of the Shrine at Kadhmayn 
A historical account of the shrine of Imam Musa al-Kadhim and Imam Muhammad Taqi al-Jawad, the Seventh and the Ninth of the Twelve Imams.
http://www.al-islam.org/shrines/kadhmayn.htmKarbala and Najaf: Shia holy cities 
BBC News feature on the history and significance of these holy cities in Iraqi and Muslim history.
http://news.bbc.co.uk/1/hi/world/middle_east/2881835.stm
A Pilgrim's Guide to the Holy Places in Iraq 
A guide to tombs important to Sufis, Shiite and Sunni traditions, by a Sufi sheikh. [PDF format]
http://www.algillani.com/books/holyplaces/holy_places_in_iraq.pdf
Ziyarat 
A brief guide to visiting the holy places of Egypt, Iran, Iraq, Jerusalem, Saudi Arabia, and Syria.
http://www.al-islam.org/ziyarat/