When I was in Turkey, I visited a few beautiful Mosques. But I don't think I have ever seen such an amazing place like Shah Cheragh Mosque in Shiraz, Iran. I need to see this place. I went to the Blue Mosque (Sultan Ahmed Mosque) in Istanbul. -picture below- The insides we filled with beautiful geometric shapes, hanging fixtures, and beautifully carpeted floor. Here are a site that lists 50 + beautiful mosques. I have recently been diving deep into geometric art and a great source is out of the Muslim tradition.