Visas: Regulations change frequently, but
currently citizens of most EU countries can stay 90 days without a visa; citizens of the
USA, Canada, Australia, New Zealand, Japan, South Africa and Israel can stay 30 days
without a visa. Most other nationalities require a visa in advance - usually issued for a
30-day stay.
Health risks: Altitude sickness, Chagas disease, cholera, dengue fever, hepatitis,
malaria, polio, rabies, tetanus, typhoid, yellow-fever