Vaccination and health: not required.

No visa is required.  May stay up to 30 calendar days extendable up to 90 days.

Documents to present:

1. Passport with a minimum validity of 3 months.
2. Proof of economic solvency, with a minimum of USD$100.00 (one hundred US dollars) per month or fraction of a month of legal stay in the country.
3. Ticket or round trip ticket to the country of origin or onward journey, or a navigational map indicating the destination.

More details here.

More information, here.