Being a predominantly Islam country, it is not a wonder to find mosques in Indonesia on almost every street. Istiqal Mosque, however, is a must-visit, a wonder unto its own. It is the biggest mosque in the Southeast Asian region and has attracted many a famous visitor including King Salman of Saudi Arabia and Barack Obama. Located in the heart of the city, the mosque has a fascinating history. Its architecture is quite interesting, too, and is well worth a closer look.