While many countries across Europe, Asia and South America have reopened their borders to foreign nationals in recent weeks, the message to Americans has been clear: you're not welcome here. While an American passport was once seen as a golden ticket to visa-free travel around the world, the country's persistently high COVID-19 caseload and death toll have prompted hundreds of countries to bar Americans from entry. Still, some nations that rely heavily on tourism are willing to take the risk of welcoming US travelers. So who's letting Americans in? We take a look here.