Visas:
All foreigners need a visa to enter Jordan. You can get one at the border or
airport when you arrive, or from consulates in your country. Visas are valid for
two weeks from entry, but can be easily extended up to three months. Cost
depends on where you're from: Australians are charged $45, Americans pay US$60,
while some nationals can enter for free. Keep your passport on you whenever
you're near the Israeli border.
Health risks: No particular risks, but you should consider vaccinations for
hepatitis, typhoid, polio and tetanus and diphtheria.