Systems and methods for playing back content based on external content are provided. An example system and method may identify content based on an environment in which a content-playback device is located. The example system and method may also detect a playback-initiation action performed by a user of the content-playback device and identify a content-playback position based on the playback-initiation action. The example system and method may also trigger playback of the content on the content-playback device based on the identified content-playback position.