Visas: US citizens do not need visas
for stays of less than eight months. Visas are also not required of citizens of
Canada or the UK and Commonwealth who stay three weeks or less. Visitors from
most other European countries need passports but not visas for stays up to three
months. Air passengers must have a return or ongoing airline ticket.
Health risks: Sunburn, prickly heat, dehydration, heat exhaustion, heat
stroke, fungal infection, diarrhea, giardiasis, HIV/AIDS, tetanus, jellyfish