South Korea

K-culture has made South Korea a top-5 global tourism destination, and the country is astonishingly easy to navigate solo. The Seoul Metro is color-coded, numbered, and has English announcements. Jimjilbangs (24-hour bathhouses with sleeping areas) cost $10-15 and solve both accommodation and entertainment. Street food alleys in Myeongdong and Gwangjang Market are designed for solo eaters. South Korea is one of the few countries where a single traveler doesn't feel awkward — "honbap" (eating alone) and "honsul" (drinking alone) are cultural norms with dedicated restaurants.