Safety Note: Volcanic activity can change without warning. In the interests of personal safety trip details may change at short notice due to volcanic activity, weather, or request from local authorities. People with asthma and other respiratory diseases should not travel to areas with high gas emissions due to the potentially harmful effects of volcanic gases. Participants travel at their own risk. All reasonable care is taken on tours, but volcanic activity is unpredictable, and no guarantee can be made about safety on an active volcano