Yes, you must acquire a visa before going to Vietnam. EU countries, UK, Canada, New Zealand, Australia, and US citizens need a visa before entering Vietnam. The visa you acquire is valid for single entry and up to 30 days travel in Vietnam. The standard tourist visa is a single entry visa that allows you to travel in Vietnam for 30 days from the date of your entry. Other nationalities who want to travel in Vietnam must inquire visa requirements with the Vietnamese Embassy in their home countries.