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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.

There’s much more to northeast Vietnam than Halong Bay. The sinking limestone plateau, which gave birth to the bay’s spectacular islands, continues for some 100km to the Chinese border. The area immediately northeast of Halong Bay is part of Bai Tu Long National Park.

A popular weekend escape from HCMC, Vung Tau rocks at weekends when beach-starved locals and expats descend in numbers, but it is relatively quiet during the week. The city enjoys a spectacular location on a peninsula, with ocean on three sides; the light and sea air make it a refreshing break from sultry Saigon.

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.

Tra Vinh, one of the prettiest towns in the Mekong Delta, is a peaceful place to explore the region's little-touted Cambodian connection. Around 300,000 ethnic Khmer live in the surrounding province and the area is dotted with more than 140 Khmer pagodas. With wide boulevards shaded by lines of trees, the town itself is more symbolic of the French colonialist era, but get beyond the outskirts and you'll soon discover that Khmer culture is still alive and well in these parts of Vietnam. Tra Vinh also has a small but active Chinese community, one of the few such communities that remain in the Mekong Delta region.

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.

Northwest Vietnam, with its rocky, cone-like mountains, high vistas and deep valleys, encompasses some of the most extreme geography in the country – if not all of Southeast Asia. Travelling to the more remote parts of the region takes time and effort, but those short on either can stick around Sapa, the surrounding hills of which are a microcosm of the region as a whole.

Meo Vac is a small but charming district capital hemmed in by steep karst mountains and, like many towns in the northwest, it is steadily being settled by Vietnamese from elsewhere. The journey here along the spectacular Mai Pi Leng Pass, which winds for 22km from Dong Van, is the main attraction. The road has been cut into the side of a cliff with a view of rippling hills tumbling down to the distant waters of the Nho Que River far below. Right at the top of the pass is a lookout point where you can stop to take in the scenery.

This really is a tale of two cities: Phan Rang hugging the shoulders of Hwy 1 and Thap Cham straddling Hwy 20 as it starts its long climb to Dalat. Anyone travelling Vietnam from north to south will notice a big change in the vegetation when approaching the joint capitals of Ninh Thuan province. The familiar lush green rice paddies are replaced with sandy soil supporting only scrubby plants. Local flora includes poinciana trees and prickly-pear cacti with vicious needles.

Lao Cai is squeezed right next to the Vietnam–China border. Razed in the Chinese invasion of 1979, most of the buildings here are modern. The border crossing slammed shut during the 1979 war and only reopened in 1993. Now it’s a bustling spot fuelled by growing cross-border trade.