An amphibious vehicle is a type of transportation that can operate both on land and in water. These vehicles are designed to transition smoothly between different environments, making them useful for various applications, such as military operations, rescue missions, and recreational activities. Typically, amphibious vehicles are equipped with features like buoyant hulls and specialized propulsion systems, allowing them to float and navigate through water. Examples include the DUKW, a World War II-era military truck, and modern amphibious tour buses that take passengers on adventures through cities and waterways.