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Once upon a time, Mui Ne was an isolated stretch of shoreline where pioneering travellers camped on the sand. Times have changed and it's now a string of beach resorts, which have fused into one long coastal strip. These resorts are, for the most part, mercifully low-rise and set amid pretty gardens by the sea. The original fishing village is still here, but tourists outnumber locals these days. There are a handful of luxury hotels (and a smattering of cheap guesthouses) but Mui Ne is mainly a midrange resort.

Ha Tien may be part of the Mekong Delta, but lying on the Gulf of Thailand it feels a world away from the rice fields and rivers that typify the region. There are dramatic limestone formations peppering the area, which are home to a network of caves, some of which have been turned into temples. Plantations of pepper trees cling to the hillsides. On a clear day, Phu Quoc Island is easily visible to the west.

The geographic heart of the nation, central Vietnam is packed with historic sights and cultural interest, and blessed with ravishing beaches and outstanding national parks. Marvel at Hue and its Imperial Citadel, royal tombs and excellent street food. Savour the unique heritage grace of riverside jewel Hoi An, and tour the military sites of the Demilitarised Zone (DMZ). Check out Danang, fast emerging as one of the nation’s most dynamic cities. Also emerging as a must-visit destination is the extraordinary Phong Nha region, home to three gargantuan cave systems (including the world’s largest cave), and a fascinating war history concealed amid stunning scenery. Enjoy well-earned downtime on the golden sands of An Bang Beach or learn to cook central Vietnamese cuisine, the nation’s most complex. With improving highways, and upgraded international airports at Hue and Danang, access to this compelling and diverse part of Vietnam has never been easier.

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.

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.

Dalat is an alternative Vietnam: the weather is spring-like instead of tropical hot, the town is dotted with French-colonial villas rather than socialist architecture, and the surrounding farms cultivate strawberries, coffee and flowers instead of rice.

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’.

Ancient Hanoi preserves the best parts of French and Chinese culture and architecture, and weaves it all into the modern world with youthful Vietnamese verve. If that gets too boisterous, two nearby national parks offer clean mountain air, rare plant life and animal-spotting opportunities. At Tam Dao Hill Station the weather is cool year round, while Ba Vi National Park offers hiking through atmospheric mist to a mountaintop temple.

With 307 species of bird, 133 species of mammal, 122 species of reptile and more than 2000 species of plant, Cuc Phuong National Park is one Vietnam’s most important protected areas.

Around 40km west of Danang lies lush Ba Na. Originally established in 1919 by the French as a hill resort, the 200-odd old villas are now ruined, but the refreshingly cool weather and gorgeous countryside views make it a worthwhile trip from Danang.