A great, ecologically friendly way to get around Lao is by bicycle. With a population of only about 6 million people, Laos has light traffic outside the main towns and biking around the country's green hills is gaining popularity. It is best to bring your own bike if you plan on a longer trip, but for shorter trips, many tour companies and guest houses rent mid-range mountain bikes. There are currently organized bike tours to the mountains and ethnic villages in Luang Namtha. Other great places to rent a bike are Vang Vieng and Luang Prabang.