Laos

The vast majority of travellers to Si Phan Don end up on these twin islands. Don Det (ດອນເດດ) is defined by its hippyesque party scene, though it's really quite mild and there's nothing stronger than grass in the 'happy' snacks sold openly at some bars.

Spreading across parts of all four southern provinces, the fertile Bolaven Plateau (ພູພຽງບໍລະເວນ; known in Lao as Phu Phieng Bolaven) is famous for its cool climate, dramatic waterfalls and high-grade coffee.

Mysterious giant stone jars of unknown ancient origin are scattered over hundreds of hilly square kilometres around Phonsavan, giving the area the misleading name of Plain of Jars (ທົ່ງໄຫຫິນ). Remarkably, little is known about the Austro-Asiatic civilisation that created them, although archaeologists estimate they date from the Southeast Asian iron age (500 BC to AD 200) and were likely used for elaborate burial rituals.

Pakse (ປາກເຊ), the capital of Champasak Province and the gateway to southern Laos, sits at the confluence of the Mekong and the Se Don (Don River). It's a relatively lively town with lots of accommodation and eating options, as well as transport connections, and many travelers base themselves here for forays to surrounding attractions such as the Bolaven Plateau and Wat Phu Champasak. The many good restaurants, stylish hotels and clued-in tour companies make it a comfortable and convenient spot.

Ever since Tha Khaek opened its French-colonial shutters to travelers and the dramatic 4.3 mile-long underworld of Tham Kong Lor became a must-see fixture on itineraries, central Laos has been enticing visitors. Thanks to its honeycomb of caves and dragon-green jungle, activities on offer run from world-class rock climbing outside of Tha Khaek to trekking in the otherworldly karst forests of Hin Namno NPA.

Phu Hin Bun NPA (ປ່າສະຫງວນແຫ່ງຊາດພູຫີນປູນ) is a huge (1580 sq km) wilderness area of turquoise streams, monsoon forests and striking karst topography across central Khammuan. It was made a protected area in 1993 and it's no overstatement to say this is some of the most breathtaking country in the region. Exploring the NPA on foot or by boat, it's hard not to feel awestruck by the very scale of the limestone cliffs that rise almost vertically for hundreds of metres into the sky. Arguably the highlight of the NPA is Tham Kong Lor, a 7.5km river passing through the cathedral-high limestone cave.

Whether it's for trekking, cycling, kayaking, ziplining or a family homestay, a visit to northern Laos is for many the highlight of their trip. Dotted about are unfettered, dense forests home to big cats, gibbons and a cornucopia of animals, with a well-established ecotourism infrastructure to take you into their heart.

Nong Khiaw (ຫນອງຂຽວ) is a traveler's haven in the truest sense, offering pampering, good food, decent accommodation and bags of activities with established adventure-tour operators. Nestled on the west bank of the Nam Ou (the river almost currentless since the building of the dam upstream), spanned by a vertiginous bridge and bookended by towering limestone crags, it's surely one of the most photogenic spots in Laos. On the river's scenic east bank (officially called Ban Sop Houn) is the lion's share of guesthouses and restaurants.

Hin Namno NPA might just be one of the most stunning protected areas in Laos, if not in all of mainland Southeast Asia, and the experts seem to agree: combined with two linked protected zones in neighbouring Vietnam, the greater area – the largest karst region in the world – is, at the time of writing, under consideration as a bi-country Unesco Natural World Heritage site.

Languid, time-trapped and somnolent during the sweltering days that batter the old city's plasterwork, Savannakhet (ສະຫວັນນະເຂດ) is a charming blend of past and present Laos. The highlight is the historic quarter with its impressive display of decaying early-20th-century architecture. There's little to do in town but wander the riverfront and cool off in one of a clutch of stylish restaurants and bijou cafes that are steadily growing in number.