Adventure films are a genre of film. They can be about an outlaw fighting for justice or battling a tyrant (e.g., Robin Hood or about pirates (e.g. Pirates of the Caribbean) or about searching for a lost city or for hidden treasure (e.g., King Solomon's Mines or Indiana Jones).
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As the name suggest, these are films where the central character takes up an adventure. Jumanji, Journey to centre of the earth, Naksha (Sunny Deol, Vivek Oberoi) ,Daastan-e-Haatimtai (Jeetendra) are examples