Adventure movies are a genre of movies. They contain many of the same features of action movies, but are usually set in exotic locations. The main theme is adventure, with the characters often exploring places they have not been before or doing things they have not done before. Common storylines include quests for lost treasure, heroic journeys for the unknown, and jungle or desert settings. Adventure movies are often set in an historical time and may be based on stories of historical or fictional adventure heroes within the historical context. Kings, battles, rebellion or piracy are commonly seen in adventure movies. Adventure movies may also be combined with other movie genres, such as science fiction, fantasy and sometimes war movies.