We will be travelling on a cruise ship in Dec 2012, stopping in Ho Chi Minh City, Hue, and Hanoi. We want to leave the ship at the port of Hue, and travel by land from Hue to Hanoi, then join the ship again in Hanoi. What visa requirments do we need?: I am a citizen of the United Sates. My friend is a citizen of Costa Rica, who also has a visa for the U.S. We will only be in Vietman for a few days. Do we need a visa?