If you have more time on your hands, add a visit to Golestan Palace and Mausoleum of Ruhollah Khomeini to your itinerary. If you have less time, it is best to skip Tehran Bazaar and head straight to Imam Plazzas, Naqsh-e Jahan Square. Remember to dress modestly, especially when visiting mosques and religious sites. Keep a scarf and a light jacket handy.