If you have a passport from these countries below, you don't need a VISA to get into Uruguay
Just fill out the form for the tourist cards ( it will be given in the plane, or ferry to you) and you will get a 90 day stamp in your passport .
But your passport is not alowed to expire in less than 6 month.
You can get another 90 days, when you go to Immigration, this costs at the moment about 18 USD.
When your 180 days expire you MUST leave the country, even if you are sick or dead - for 24 hours, then you can return for a new 90 days/90 days visa .
These are the countries that do not require a Visa to visit Uruguay:
ALEMANIA
ARGENTINA
AUSTRALIA
AUSTRIA
BAHAMAS
BARBADOS
BELGICA
BELICE
BOLIVIA
BRASIL
CANADA
COLOMBIA
COREA DEL SUR
COSTA RICA
CROACIA
CHILE
CHIPRE
DINAMARCA
ECUADOR
EL SALVADOR
ESLOVAQUIA
ESLOVENIA
ESPAÑA
ESTADOS UNIDOS
FINLANDIA
FRANCIA
GRAN BRETAÑA
GRECIA
GUATEMALA
HOLANDA
HONDURAS
HUNGRIA
IRLANDA
ISLANDIA
ISRAEL
ITALIA
JAMAICA
JAPON
LETONIA
LICHTENSTEIN
LITUANIA
LUXEMBURGO
MALASIA
MALTA
MEXICO
MONACO
NICARAGUA
NORUEGA
NUEVA ZELANDIA
PANAMA
PARAGUAY
PERU
POLONIA
PORTUGAL
REPUBLICA DE BULGARIA
REPUBLICA CHECA
REPUBLICA DOMINICANA
RUMANIA
SUDAFRICA
SEYCHELLES
SUECIA
SUIZA
TRINIDAD TOBAGO
TURQUIA
VENEZUELA
LAISSEZ PASSER COMISION EUROPEA
PASAPORTES OEA
PASAPORTES ONU