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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.

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.

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.

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.

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.

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.

Just 3km north of Hoi An, An Bang is one of Vietnam’s most happening and enjoyable beaches. At present there's a wonderful stretch of fine sand and an enormous horizon (with less of the serious erosion evident at Cua Dai), and with only the distant Cham Islands interrupting the seaside symmetry. Staying at the beach and visiting Hoi An on day trips is a good strategy for a relaxing visit to the area.

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.

Notable for its extensive mangrove forest, Can Gio is a low, palm-fringed island sitting at the mouth of the Saigon River, some 25km southeast of Ho Chi Minh City. It was formed from silt washing downstream from the river, so don’t expect any white-sand beaches. A few hopeful resorts have sprung up along the murky 10km shoreline.

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.