When you travel as much as most of us do, there will be a time when visa requirements for visiting a country get confusing… and expensive. For instance, I have family I visit in Chile, so before the visa requirements for U.S. citizens were changed, I was paying a hefty visa fee each time I went to Chile. My cousins are worth it – thanks cousins for reading TWG :)
Checking each country’s visa requirements, even when you think you know what they are, should be on everyone’s pre-trip travel checklist. For a trip to Vietnam, I checked about visa requirements for U.S. citizens in two places. The Wikipedia page shows that Vietnam does require a visa and it mentions an eVisa. But there is no link that tells me more about what that is.