Generally, crowds detract from an experience - more so in a beautiful, serene, spiritual place. In Istanbul the Blue Mosque (Sultanahmet Camii) suffers due to it's popularity - especially with the cruise ship populations! To see/feel it as it should be seen/felt go in the evening - no crowds and a bonus of gorgeous lighting effects. Avoid prayer times by visiting www.namazvacti.com/Main.php?WSLanguage=EN
For general info: www.bluemosque.co
Sultahmet Camii, 34122 Sultanahmet, Fatih
Istanbul
Google map: bit.ly/ZSB61Y