Salzburg

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

This stupendous coastline of ravishing white sands and azure bays is Vietnam's premier destination for beach holidays.

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.

Rugged, craggy and jungle-clad Cat Ba, the largest island in Halong Bay, has experienced a tourism surge in recent years. The central hub of Cat Ba Town is now framed by a chain of low-rise concrete hotels along its once-lovely bay, but the rest of the island is largely untouched and as wild as ever. With idyllic Lan Ha Bay just offshore, you'll soon overlook Cat Ba Town's overdevelopment.

South of Hanoi, Ninh Binh province is blessed with natural beauty, cultural sights and the Cuc Phuong National Park. Highlights include boat trips amid karst landscapes at Tam Coc and the Unesco World Heritage-listed Trang An Grottoes.

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.

Lang Co is an attractive island-like stretch of palm-shaded white sand, with a turquoise lagoon on one side and 10km of beachfront on the other. As a beach resort it's more geared to Vietnamese day trippers than Western travellers, but if the weather's nice the ocean is certainly inviting (if you stay away from the central section, which could be cleaner). High season is April to July. From late August to November rains are frequent, and from December to March it can get chilly.

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.

Most of the bases and bunkers have long vanished, but this 5km strip of land on either side of the Ben Hai River is still known by its American War moniker: the DMZ. From 1954 to 1975 it acted as a buffer between the North and the South. Ironically, the DMZ became one of the most militarised areas in the world, forming what Time magazine called ‘a running sore’.

Towering limestone pillars and tiny islets topped by forest rise from the emerald waters of the Gulf of Tonkin. Designated a World Heritage Site in 1994, Halong Bay's scatter of islands, dotted with wind- and wave-eroded grottoes, is a vision of ethereal beauty and, unsurprisingly, northern Vietnam's number one-tourism hub.