Each country has a list of requirements that must be met prior to being allowed entry into the country. This list can include passports, visas, immunizations, medical requirements, entry fees, and even travel insurance.
Travel.State.Gov is an excellent resource for anyone planning to travel overseas. It provides background information and links to destination countries’ requirements for Americans traveling abroad. It also includes material on passports, visas, immunizations, medical information, additional fees, and conditions abroad that may affect your safety and security.