Photo by Matthew Kepnes
In Southeast Asia, all roads lead to Bangkok, and for most backpackers, Bangkok means Khao San Road. Khao San is the first stop on the Southeast Asian tourist trail, which loops through Thailand, Laos, Vietnam and Cambodia.
You could follow the tourist trail to Chang Mai, float down the river to Luang Prabang, cross over the mountains to Vietnam, dip into Cambodia, and finally head back to Bangkok, hitting all the major tourist stops along the way.