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Set in an idyllic valley, hemmed in by hills, the Mai Chau area is a world away from Hanoi's hustle. The small town of Mai Chau itself is unappealing, but just outside the patchwork of rice fields rolls out, speckled by tiny Thai villages where visitors doss down for the night in traditional stilt houses and wake up to a rural soundtrack defined by gurgling irrigation streams and birdsong.

Dien Bien Phu (DBP) plays a star role in Vietnam's modern history. It was in the surrounding countryside here, on 7 May 1954, that the French colonial forces were defeated by the Viet Minh in a decisive battle, and the days of their Indochina empire became numbered.

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.

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.

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.

The spectacular karst limestone landscapes around Ninh Binh and Tam Coc are ideal for exploring by boat or bicycle, and there are stellar opportunities for caving and trekking amid the fast-developing travellers' scene of the Phong Nha-Ke Bang National Park. Dong Hoi, the coastal gateway to Phong Nha, also has an enjoyable low-key beach scene and good restaurants.

Northeast Vietnam includes Halong Bay, one of the region's biggest draws. Reasons to linger after your boat trip include the lesser-known but stunning Bai Tu Long Bay, the intersection of nature and culture that is Ba Be National Park, the otherworldly karst landscapes outside of Cao Bang and the urban options in Haiphong.

The bustling port city of Phan Thiet is traditionally known for its nuoc mam (fish sauce), producing millions of liters of the stuff per annum. There's not much to see in town, but the riverside fishing harbor is always chock-a-block with brightly-painted boats and there are sights nearby including the Ke Ga lighthouse and Ta Cu Mountain.

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.

Nowhere in Vietnam is changing as fast as Danang. For decades it had a reputation as a quiet provincial town, but big changes are ongoing. Stroll along the Han riverfront and you'll find gleaming new modernist hotels, and apartments and restaurants are emerging. Spectacular bridges now span the river, and in the north of the city, the landmark new D-City is rising from the flatlands. Venture south and the entire Danang Beach strip is booming with hotel and resort developments.