According to Wikipedia: The Visa Waiver Program (VWP) is a program of the United States Government which allows citizens of specific countries to travel to the United States for tourism or business for up to 90 days without having to obtain a visa. The program applies to the 50 U.S. states as well as the U.S. territories of Puerto Rico and the Virgin Islands in the Caribbean, with limited application to other U.S. territories. All countries selected by the U.S. government to be in the program are high-income economies with a high Human Development Index and are regarded as developed countries.
Individuals from visa waiver countries must apply for travel through the Electronic System for Travel Authorization, and meet a variety of additional requirements.
Well I think that is a success for Greece taking into consideration difficulties with neighbour countries, illegal immigrants and the new greek law on how to acquire the Greek citizenship!
There are currently 36 countries participating in the Visa Waiver Program:* Andorra * Australia * Austria * Belgium * Brunei * Czech Republic * Denmark * Estonia * Finland * France * Germany * Greece * Hungary * Iceland * Ireland * Italy * Japan * Korea, Republic of * Latvia * Liechtenstein * Lithuania * Luxembourg * Malta * Monaco * Netherlands * New Zealand * Norway * Portugal * San Marino * Singapore * Slovakia * Slovenia * Spain * Sweden * Switzerland * United Kingdom