Kambodja

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.

Cambodia's South Coast (ឆ្នេរខាងត្បូង) provides the antidote to temple-hopping tick lists. The beaches draw most folk here, but stick around and you'll see this region is more than its sandy bits.

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.

It's not hard to see why travelers become entranced with Kampot (កំពត). This riverside town, with streets rimmed by dilapidated shophouse architecture, has a dreamy quality; as if someone pressed the snooze button a few years back and the entire town forgot to wake up. The Kompong Bay River – more accurately an estuary – rises and falls with the moons, serving as both attractive backdrop and water-sports playground for those staying in the boutique resorts and backpacker retreats that line its banks upstream from the town proper.

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.

The provincial capital of Mondulkiri, Sen Monorom (សែនមនោរម្យ) is really an overgrown village, a charming community set in the spot where the hills that give the province its name meet. In the center of town are two lakes, leading some dreamers to call it "the Switzerland of Cambodia."

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.

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.

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.

The traveller's first glimpse of Angkor Wat, the ultimate expression of Khmer genius, is matched by only a few select spots on earth. Built by Suryavarman II (r 1112–52) and surrounded by a vast moat, the temple is one of the most inspired monuments ever conceived by the human mind.