DO YOU HAVE A worthwhile project or field of study that involves traveling? If so, consider having your travels funded through a grant, fellowship, or travel scholarship.
Begin by contemplating where you want to go and potential projects you could build around those destinations. (Or vice versa.) Always wondered how sustainable agriculture works in Guam? How about local conservation practices in Central America? Once you have a clear vision of a travel / research project, begin looking for funding possibilities that give you the most freedom to pursue your goals.