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

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.

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.

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.

Just off the Danang Beach coastal road, the Marble Mountains (Ngu Hanh Son) consist of five craggy marble outcrops topped with pagodas. Each mountain is named for the natural element it’s said to represent: Thuy Son (Water), Moc Son (Wood), Hoa Son (Fire), Kim Son (Metal or Gold) and Tho Son (Earth). The villages that have sprung up at the base of the mountains specialise in marble sculpture, though they now astutely use marble from China rather than hacking away at the mountains that bring the visitors in.

There’s much more to northeast Vietnam than Halong Bay. The sinking limestone plateau, which gave birth to the bay’s spectacular islands, continues for some 100km to the Chinese border. The area immediately northeast of Halong Bay is part of Bai Tu Long National Park.

Northwest Vietnam, with its rocky, cone-like mountains, high vistas and deep valleys, encompasses some of the most extreme geography in the country – if not all of Southeast Asia. Travelling to the more remote parts of the region takes time and effort, but those short on either can stick around Sapa, the surrounding hills of which are a microcosm of the region as a whole.

Highlights of the Danang region include the city's impressive urban energy, the rapidly evolving beach scene to the east of the river, and more remote and spectacular coastal scenery of the nearby Son Tra Peninsula. Look forward to some of Vietnam's best seafood and street food. It's worth booking a walking tour with a local to best understand Danang.

Northern Vietnam's most appealing city has a distinctly laid-back air with its tree-lined boulevards host to a bundle of colonial-era buildings. Caffeine-aficionado heaven, the central area buzzes with dinky cafes where tables spill out onto the pavements – perfect for people watching.