A gap year favourite but south east Asia still has many pockets left under-explored. In this episode of Travel Smart, Ben Parker and Simon Calder give you a whistle-stop guide to Vietnam, Thailand and Singapore.Simon explains what to see in Thailand's capital, Bangkok and Chiang Mai, before taking a look round the beautiful islands off the coast. Ben meanwhile takes a tour of Malaysia and the sights to see there, before Simon gives his guide to the urban sprawl of Singapore.Watch Travel Smart on Independent TV for your guide to travelling smart.