Disaster Medical Aid offers insurance and medical assistance for travelers. It would cover you if you had to be airlifted off a mountain as a result of a skiing or hiking accident, or if you had to halt for a extended period of time in a foreign hospital. Insurers would also supply insurance cover if you got critically sick or were injured and had to be flown home. Some commercial airlines require very sick passengers to travel on a stretcher with a doctor. Usually this means that you may have to pay for 10 or more seats on a plane at a potential pot cost of over $10,000.
Ahead of purchasing this sort of coverage, make sure with your particular health insurance carrier. Find out what sort of coverage you comprise when traveling overseas and if there are any limits. Also, ask if the policy will pay to fly you home or to a country with first-rate medical care.