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.

The port of Chan May is close to a number of central Vietnam's star attractions. Just to the north lies Hue and its crumbling Imperial Citadel, a UNESCO World Heritage Site, while to the south is the city of Da Nang, a major US airbase during the Vietnam War, and pretty Hoi An, a dreamy tropical haze of teetering merchant houses, bustling markets and Chinese temples.

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.

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.

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.

Singapore’s heritage as an important trading post means that there is a real cultural mix, with four official languages: English, Chinese, Malay and Tamil. Step away from the gleaming towers and you’ll find yourself transported into another world amongst the intoxicating streets of Chinatown and Little India.

The sweltering city of Semarang, on the north coast of Java, is an intriguing mish-mash of Chinese, Islamic and Dutch colonial influences. We recommend escaping the heat with a trip up into the mountains to visit a coffee plantation, or joining an excursion to the extraordinary temple complex at Borobudur.

Surabaya, situated on the northeast coast of Java, is Indonesia’s second largest city and the place where the country’s struggle for independence began. The warren-like Arab Quarter is worth exploring, though many visitors use the city as a base for visiting nearby Mount Bromo.