Kambodja

Mondulkiri Province (ខេត្តមណ្ឌលគិរី), the original wild east, is a world apart from the lowlands with not a rice paddy or palm tree in sight.

Gateway for the temples of Angkor, Siem Reap (see-em ree-ep; សៀមរាប) was always destined for great things. Visitors come here to see the temples, of course, but there is plenty to do in and around the city when you're templed out. Siem Reap has reinvented itself as the epicentre of chic Cambodia, with everything from backpacker party pads to hip hotels, world-class wining and dining across a range of cuisines, sumptuous spas, great shopping, local tours to suit both foodies and adventurers, and a creative cultural scene that includes Cambodia's leading contemporary circus.

Sure, Sihanoukville (ក្រុងព្រះសីហនុ) would never win first prize in a pretty-town competition, and much of it is now dominated by casinos and tacky commercial centres. But despite the rapid and mostly unwanted development, it has remained the jumping-off point for the best of Cambodia's white-sand beaches and castaway-cool southern islands. The Serendipity Beach area is a decompression chamber for backpackers, who flock here to rest up between travels and party through the night.

A supremely mellow riverside town, Kratie (ក្រចេះ, pronounced kra-cheh) has an expansive riverfront and some of the best Mekong sunsets in Cambodia. It is the most popular place in the country to see Irrawaddy dolphins, which live in the Mekong River in ever-diminishing numbers. There is French-era architecture here, as it was spared the wartime bombing that destroyed so many other provincial centers.

Sleepy Koh Kong (ក្រុងកោះកុង) was once Cambodia's Wild West with its isolated frontier economy dominated by smuggling and gambling. Although remnants of its less-salubrious past still cling on, today this low-slung town is striding towards respectability as ecotourists, aiming to explore the Cardamom Mountains and coastline, bring in alternative sources of revenue.

Home to diverse landscapes and peoples, eastern Cambodia shatters the illusion that the country is all paddy fields and sugar palms. There are plenty of those in the lowland provinces, but here they yield to the mountains of Mondulkiri and Ratanakiri Provinces, where ecotourism is playing a major role in the effort to save dwindling forests from the twin ravages of illegal logging and land concessions.

Koh Rong (កោះរ៉ុង) was once little more than a jungle-clad wilderness rimmed by swaths of sugary-white sand, with a few beach-hut resorts speckling the shore around tiny Koh Tuch village. Today the Koh Tuch village street-strip that leads out from the pier is a bottleneck of back-to-back backpacker crash pads, restaurants and hole-in-the-wall bars blasting competing music. You'll either love it or hate it, but for young travellers who descend off the ferry in droves, Koh Rong (particularly Koh Tuch Beach) is a vital stop on any Southeast Asia party itinerary.

The glimmering spires of the Royal Palace, the fluttering saffron of the monks’ robes and the luscious location on the banks of the mighty Mekong – Phnom Penh (ភ្នំពេញ) is the Asia many daydream about from afar.

Cambodia's southern islands are the tropical Shangri-La many travellers have been seeking – as yet untouched by the mega-resorts that have sprouted across southern Thailand. Many of the islands have been tagged for major development by well-connected foreign investors, but the big boys have been slow to press go, paving the way for DIY development to move in with rustic bungalow resorts.

You can really get away from it all at this lush, elevated park a two-hour drive southwest of Phnom Penh. Winding trails lead through pine forests to cascading wet-season waterfalls and cliffs with amazing views of the Cardamom Mountains, and there’s some great mountain biking to be done if you’re feeling adventurous.