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Often referred to as the Ba Be Lakes, Ba Be National Park was established as a national park in 1992. The scenery here swoops from limestone mountains peaking at 1554m down into plunging valleys wrapped in dense evergreen forests, speckled with waterfalls and caves, with the lakes themselves dominating the very heart of the park.

A French-era hill station, this national park reaches a peak of 1450m at Bach Ma mountain, only 18km from the coast. The cool climate attracted the French, who built over a hundred villas here. Not surprisingly the Viet Minh tried hard to spoil the holiday – the area saw some heavy fighting in the early 1950s and again during the American War.

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.

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.

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.

Established as a hill station by the French colonialists in 1922, Sapa today is the tourism centre of the northwest.

Sleepy Bac Ha wakes up for the riot of color and commerce that is its Sunday market, when the lanes fill with villagers who flock in from the hills and valleys. Once the barter, buy and sell is done and the day-tripper tourist buses from Sapa have left, the town rolls over and goes back to bed for the rest of the week.

Welcome to an alternative reality populated by European royalty, film stars and the otherwise rich and secretive. For the average punter not able to afford an uber-luxurious hotel, this place doesn’t exist. Well, at least not before 2017, when the mother-of-all flashpacker retreats opened here on a private bay.

Cat Tien comprises an amazingly biodiverse area of lowland tropical rainforest. The 72,000-hectare park is one of the outstanding natural treasures in Vietnam, a true jungle, and the hiking, mountain biking and birdwatching here are the best in the south of the country. At weekends and public holidays it gets busy with domestic tourists – it's worth calling ahead to book the most popular excursions.

A large, prosperous coastal city, Quy Nhon (pronounced ‘hwee ngon’) boasts a terrific beach-blessed shoreline and grand boulevards. Its seaside appeal and tidy, litter-free streets make it the kind of place that affluent Vietnamese couples choose to retire to, spending their final days ocean-gazing and promenade-walking.