Salzburg

170 mil långa Återföreningsexpressen löper längs Vietnams tropiska kust. Vagabonds utsända gjorde den episka tågresan från söder till norr.

Mustiga nudelkok, frasiga rispannkakor, färskpressad passionsfruktjuice och vidunderlig cao lau. Vi reser från södra till norra Vietnam och testar Asiens bästa street food.

Practically obliterated during the American War, Vinh was rebuilt with East German aid – hence the brutalist concrete architecture dominating downtown. The only reasons to stop here are if you're a Ho Chi Minh devotee (he was born in a nearby village), or if you're heading to Laos.

If the tenacious spirit of the Vietnamese can be symbolised by a place, few sites are more symbolic than Cu Chi. At first glance there is scant evidence today of the fighting and bombing that convulsed Cu Chi during the war. To see what went on, you have to dig deeper – underground.

Ho Chi Minh City (HCMC) is Vietnam at its most dizzying: a high-octane city of commerce and culture that has driven the country forward with its pulsating energy. A chaotic whirl, the city breathes life and vitality into all who settle here, and visitors cannot help but be hauled along for the ride.

Graceful, historic Hoi An is Vietnam’s most atmospheric and delightful town. Once a major port, it boasts the grand architecture and beguiling riverside setting that befits its heritage, and the 21st-century curses of traffic and pollution are almost entirely absent.

The ‘rice bowl’ of Vietnam, the delta is carpeted in a dizzying variety of greens. It's a water world that moves to the rhythms of the mighty Mekong, where boats, houses and markets float upon the innumerable rivers, canals and streams that criss-cross the landscape like arteries.

Gateway to the Mekong Delta, My Tho is the capital of Tien Giang province and an important market town – although for the famous floating markets, you’ll need to continue on to Can Tho.

Designated a Unesco World Heritage Site in 2003, the remarkable Phong Nha-Ke Bang National Park contains the oldest karst mountains in Asia, formed approximately 400 million years ago. Riddled with hundreds of cave systems – many of extraordinary scale and length – and spectacular underground rivers, Phong Nha is a speleologists’ heaven on earth.