In Iraq, a man visits the Taq Kasra

• In Iraq, a man visits the Taq Kasra, or the Archway of Ctesiphon, a Persian ruin on the Tigris
•  River near Salman Pak, south of Baghdad, on July 18, 2012. Ctesiphon was once an ancient city 
• on the Tigris and a hub on the Silk Road, connecting to many other routes throughout the region. 
• Today, the arch is one of the few remaining structures left after the rapid fall of 
• Ctesiphon about 1,300 years ago.