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Isolated from the mainland, the Con Dao islands are one of Vietnam's star attractions. Long the preserve of political prisoners and undesirables, they now turn heads thanks to their striking natural beauty. Con Son, the largest of this chain of 15 islands and islets, is ringed with lovely beaches, coral reefs and scenic bays, and remains partially covered in tropical forests. In addition to hiking, diving and exploring deserted coastal roads there are excellent wildlife-watching opportunities, such as the black giant squirrel and endemic bow-fingered gecko.

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

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.

Plonked about midway between My Tho and Can Tho, Vinh Long is a major transit hub and the capital of the province. For travelers, it's a gateway to island life, Cai Be floating market, abundant orchards and rural homestays.

This eponymous provincial capital isn't unpleasant; the climate is mild, and winter days can bring a chilly welcome relief from the heat when a thick fog clings to the banks of the Bang Giang River. But you'll most likely use the city as a base to explore rural Cao Bang province, one of the most beautiful regions in Vietnam.

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.

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.

Steadily being transformed into a vast new city, Tuy Hoa is characterised by its vast plaza and multi-laned boulevards. It’s a possible overnight stop to break up a longer journey, especially for cyclists brave enough to tackle Hwy 1, but most visitors are just passing through.

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.

A breathtaking cluster of granite islands, set in aquamarine seas around 15km directly offshore from Hoi An, the Cham Islands make a wonderful excursion. The islands were once closed to visitors and under close military supervision, but now day trips, diving or snorkelling the reefs, and even overnight stays, are possible.