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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.

The high-rise, high-energy beach resort of Nha Trang enjoys a stunning setting: it's ringed by a necklace of hills, with a turquoise bay dotted with tropical islands.

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 site of Vietnam’s most extensive Cham remains, My Son enjoys an enchanting setting in a lush jungle valley, overlooked by Cat’s Tooth Mountain (Hon Quap). The temples are in poor shape – only about 20 structures survive where at least 68 once stood – but the intimate nature of the site, surrounded by gurgling streams, is still enthralling.

With its river setting and relatively traffic-free streets, relaxed Kon Tum makes a great stop for travelers intent on exploring the surrounding hill-tribe villages, of which there are 700 or so dotting the area – mostly Bahnar, but also Sedang and Jarai. This is a far better base than Pleiku for delving into indigenous culture, and there are a few intriguing sights in Kon Tum itself.

Fringed with white-sand beaches and with large tracts still cloaked in dense tropical jungle, Phu Quoc rapidly morphed from a sleepy island backwater to a must-visit beach escape for Western expats and sun-seeking tourists. Beyond the resorts lining Long Beach, rapid development beginning on the east coast and mega resorts in sight of Sao Beach, there's still ample room for exploration and escaping the sometimes littered waters. Dive the reefs, kayak in the bays, eat up the back-road kilometres on a motorbike or just lounge on the beach, followed by a massage and a fresh seafood dinner.

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.

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.

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.

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.