Attracting everyone from budget backpackers to ostentatious oligarchs, Koh Samui is one of Thailand’s most popular islands. It’s no surprise, given the truly stunning beaches, but the more developed areas such as Chaweng have lost a lot of their charm, so head for the quieter south and west if you can.

The once sleepy backwater of Kompong Som, renamed after the former king Norodom Sihanouk, is the rising star of the Cambodian coast’s burgeoning tourist industry. Here you’ll find beautiful sandy beaches and a string of laid back islands that are still largely undeveloped.

Thailand’s sprawling capital is an assault on the senses, an invigorating blend of tradition and modernity. Soaring skyscrapers, air-conditioned shopping malls and an efficient public transport system combine with shimmering golden temples, ancient palaces, floating markets and at times gridlocked rush hour traffic.

Saigon, as it was known then, was the capital of the South during the Vietnam War, and American-style capitalism has been embraced more enthusiastically here than in the North, with a clutch of shining skyscrapers standing as testament to Vietnam’s surging economic growth.

China is not usually associated with beach holidays, but the island of Hainan, billed as ‘China’s Hawaii’, aims to challenge those preconceptions. It’s fair to say that there’s still a fair way to go, but the beaches around Sanya are pleasant enough, and the rapidly developing skyline is a sight in itself.

Wander along the perfumed streets of Hanoi’s atmospheric Old Quarter and you could almost forgive yourself for thinking you’d travelled back in time, were it not for the beeping, buzzing morass of motorcycles zipping past.