Masjid Al-Hussain in Kuala Perlis is special. It extends over the Straits of Melaka. Its walls are adorned with corals, quartz, granites, marbles and pebbles. Its golden-yellow and blue dome is made from two layers of aluminium with a layer of polyvinylidene difluoride to protect its surface. Its twin minarets are the first hexagonal minarets in the world.