What is a `Visa on Arrival ?`: this is most likely the easiest way to obtain your visa without having to chase down embassies, consulates and the like prior to your trip, and is a valid alternative when applying for a tourist visa. The entry visa will be stamped on your passport as you pass through our immigration checkpoint. Though valid for thirty days, it can be extended once you enter Viet Nam. With this type of visa, you only can enter the country by air.