Minecraft adventure maps are worlds that have been premade and normally have a quest here is one in the link below. To get a map in Minecraft download the world type in %appdata% go into Roaming file inside that there should be a folder called .minecraft go into that and inside that should be a folder called saves go into that and drag the map into the saves file shut all the files down and go into minecraft and in your worlds the world shall be there. Here is the download link for the map:

http://yttriuszzerbus.co.uk/hotscar/AirHome1.zip