Amphibious vehicles are specially designed to operate both on land and in water. They combine features of traditional vehicles, like cars or trucks, with those of boats or ships. This versatility allows them to navigate various terrains, making them useful for military operations, rescue missions, and recreational activities. These vehicles often have waterproof bodies and propellers or tracks that enable them to move efficiently in different environments. Examples of amphibious vehicles include the DUKW, a World War II military truck, and modern amphibious tour buses that take passengers on land and water excursions.