If you're looking to immerse yourself in a place steeped in history and culture, you might assume you'd need to set aside several days and a hefty budget. However, that's not always the case. While some destinations do demand more time, there's one tiny city that can be fully explored in just a day. Even better, it's the cheapest place to visit globally. According to research by Safari company Go2Africa, Vatican City is one of the least expensive places to explore worldwide. They analysed