Passports
The websites listed provide downloadable passport applications as well as the current fees for processing passport applications. For an up-to-date country-by-country listing of passport requirements around the world, go to the "Foreign Entry Requirement" Web page of the U.S. State Department at http://travel.state.gov.
For entry into Greece, citizens of Australia, Canada, New Zealand, South Africa, the United States, and almost all other non-E.U. countries are required to have a valid passport, which is stamped upon entry and exit, for stays up to 90 days. All U.S. citizens, even infants, must have a valid passport, but Canadian children under 16 may travel without a passport if accompanied by either parent.
Citizens of the United Kingdom and other members of the European Union are required to have only a valid passport for entry into Greece, and it is no longer stamped upon entry; you may stay an unlimited period (although you should inquire about this at a Greek consulate or at your embassy in Greece). Children under 16 from E.U. countries may travel without a passport if accompanied by either parent. All E.U. citizens are reminded that they should check the requirements for non-E.U. countries through which you might travel to get to Greece.
Visas
For stays longer than 90 days, all non-E.U. citizens will require visas from the Greek embassies or consuls in their home countries. If already in Greece, arrangements must be made with the Bureau of Aliens, 173 Leoforos Alexandras, 11522 Athens (tel. 210/770-5711).