5. Shrine of Imam Reza
This architecturally magnificent and significant mausoleum complex contains the largest mosque in the world. There are courtyards, halls, tombs, libraries and a museum here. It’s a major pilgrimage center for Shia Muslims and a popular tourist destination, too. Its golden dome and minaret are as famous in Iran as St. Peter’s Square is in Rome.

6. Citidel of Bam
The Citidel of Bam in southeastern Iran dates back to the 6th Century BC. It was an important crossroads and oasis on the famous Silk Road. The entire city was made of mud bricks, clay, straw and palm trees. It’s considered the world’s largest adobe structure. Sadly, it was also the site of a devastating earthquake in 2003 where over 26,000 people perished. As a UNESCO World Heritage Site, several countries are involved in Bam’s reconstruction.
