What do Brazil, China and India have in common? All require American travelers to get a visa. And they are not the only countries. A visa is a travel document some nations require in addition to the passport. Getting one usually costs $80 to $140, plus processing fees. That expense can be a rude shock to individual travelers on a budget. But on a group trip, it is usually an invisible cost folded into the tour price.
Tourist walk near St. Basil's cathedral on Red Square in central Moscow on August 4, 2010.
The ocean liner Queen Mary 2 arrives to Salvador's harbor in the Bahia state in northeastern Brazil. (Feb. 2004)
Tourists visit the Taj Mahal in Agra, India. (Dec. 4, 2010)
Tourists visit the world heritage site, Angkor Wat temple in Siem Reap province, some 300 kilometers northwest of Phnom Penh. The temple is Cambodia's most famous attraction. (Feb. 21, 2011)
Tourists take pictures of the Christ the Redeemer statue -- following its reopening -- at the Corcovado hill, in Rio de Janeiro on June 30, 2010.
A passport shows the obligatory visa that US citizens need in order to travel to China.