Entry requirements for Americans:
US nationals must have a valid passport. A visa is not required for stays of up to three months.
Entry requirements for UK nationals:
UK nationals must possess a valid passport. A visa is not required for stays of up to three months. British Overseas Territories Citizens, British Nationals (Overseas) and British Overseas Citizens require an endorsement on their passports guaranteeing re-admittance to the UK or the country that issued the passport.
Entry requirements for Canadians:
 Canadians must have a valid passport. A visa is not required for stays of up to three months.
Entry requirements for Australians:
Australian nationals must have a valid passport. A visa is not required for stays of up to three months.
Entry requirements for South Africans:
South African nationals require a valid passport. A visa is required.
Entry requirements for New Zealanders:
New Zealand nationals require a valid passport. No visa is required for stays of up to three months.
Entry requirements for Irish nationals:
Irish nationals require a valid passport. No visa is required for stays not exceeding three months.
Passport/Visa Note:
The borderless region known as the Schengen area includes the following countries: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Italy, Luxembourg, The Netherlands, Norway, Portugal, Spain and Sweden. All these countries issue a standard Schengen visa that, in principal, allows the holder to travel freely within the borders of all. All visitors require a passport that is valid for at least three months after leaving Belgium. Nationals of non-EU countries are recommended to hold return or onward tickets, sufficient funds and documents for their next destination.