A visa is a document issued by a
country giving an individual permission to formally request
entrance to the country during a given period of time and
for certain purposes and usually stamped or glued inside of
a passport, or sometimes issued as separate pieces of paper.
Many countries require possession of a valid passport and
visa as a condition of entry for foreigners, though there
exist exemptions. It is important to apply for a visa for
the counties requiring them well in advance of your travel
date. Most travel agencies can assist you in obtaining these
visa(s). Also there are services such as Travisa (
http://www.travisa.com/travelvisa.htm) can obtain
visas for a fee. The fee includes their services and charges
from the issuing country plus any handling fees. The issuing
county requires that you have a valid passport for their
review before they will issue a visa..