http://travel.state.gov/visa/visa_1750.html   This is the U.S. State Department, Bureau of Consular Affairs’ Foreign Entry Requirements web page.  It lists the entry requirements of most foreign countries.  It also includes the addresses and telephone numbers of foreign embassies and consulates in the United States.  It is a good starting point, but remember that the information is subject to change.  Always check directly with the embassy or consulate of the country you a planning to visit.