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Backpackers flock to budget-friendly Vietnam, where you can still get a bed for a few bucks a night, rent a scooter for the same, then binge on some of the best street meat on earth (and killer iced coffee proffered in plastic bags). One of the most affordable adventures here costs just $10 per day. Rent an old Minsk 125cc motorcycle from Hanoi Motor Cycle Rental for self-guided tours through spectacular areas to the north of Hanoi around Son La, Lai Chau and the mountain town of Sapa, surrounded by rice terraces and trekking routes. With the Dong you save cruising around on two wheels, you can afford to splash out on a junk boat cruise through the dramatic karst landscapes of Halong Bay.