Which of the following is NOT a type of tourism?

Weather tourism is not recognized as a distinct type of tourism in the same way that adventure, cultural, and medical tourism are. Adventure tourism entails activities that involve exploration or travel with an element of risk, such as hiking, climbing, or extreme sports, attracting thrill-seekers. Cultural tourism focuses on experiencing the heritage and lifestyle of a destination, including visits to historical sites, museums, and cultural performances, allowing travelers to immerse themselves in local traditions. Medical tourism refers to traveling abroad to obtain medical treatment, often for procedures that may be less expensive or not available in one’s home country. Unlike these established categories, "weather tourism" does not have a recognized framework or substantial industry presence, which is why it stands out as the option that does not fit within the well-defined types of tourism.