Brunei Darussalam is a tiny, oil rich Muslim country on the island of Borneo in Southeast Asia, and its capital city (Bandar Seri Begawan) only has a population of about 100,000 people. This entire country is mostly overlooked by tourists, but there are dozens of big, fancy mosques here that are definitely worth checking out.
The two main mosques in Brunei are Omar Ali Saifuddien and Jame’Asr Hassanil Bolkiah. These are real works of art, with huge golden domes and 60 meter tall minarets. Even if you're not a big architecture buff, it's easy to admire the intricate showy designs, especially when you throw in some palm trees and blue skies in the background (this is Southeast Asia, after all).
Read through this complete Brunei travel guide for more info on what to expect!