Bandar Seri Begawan (Things to do - Places to Visit) - Bandar Seri Begawan Top Tourist Placesbr Capital of Bruneibr Bandar Seri Begawan is the capital of Brunei, a tiny nation on the island of Borneo. It’s known for the opulent Sultan Omar Ali Saifuddien Mosque, adorned with chandeliers, stained glass, and Italian marble, and surrounded by a lagoon. br br Nearby, the Royal Regalia Building showcases a gold carriage and lavish gifts presented to the sultan. To the northwest is the Jame’Asr Hassanil Bolkiah Mosque, with 29 golden domes.