This issue of Medical Clinics of North America, guest edited by Paul S. Pottinger and Christopher A. Sanford, is devoted to Travel and Adventure Medicine. Articles in this issue include: Immunizations; Malaria; Personal Protection Measures; Traveler's Diarrhea; Urban Medicine and Trauma; Care of the Healthcare Provider; Evaluation of the Ill Returned Traveler; The Ethics of Medical Volunteerism; High-Altitude Medicine; Dive Medicine; Wilderness Medicine, Including First Aid & Hypo/Hyperthermia; The Medical Kit; Adventure Sports: Spelunking, water exposures; and Resources for the Provider and Opportunities in Further Training in Travel and Adventure Medicine.