Indonesia
Credit: Jesse Warren / Getty Images

Serious thrills – from climbing volcanoes like Gunung Agung on Bali or Mount Rinjani on the neighboring island of Lombok to surfing legendary breaks at Bali's Uluwatu or Java's G-Land – come cheap on the world's largest archipelago. Sure, it can cost a pretty penny to get yourself to Indonesia. But once you're here, excellent accommodations can easily be had for about $60 per night. Tours are even cheaper here than in nearby Malaysia and Thailand, roughly ten dollars gets you a very decent massage, and you can rent a motor bike for around $5 per day. You'll eat like a king for the cost of a donut back home.