"Wonder" is the second track on Adventure Club's debut extended play Calling All Heroes. Unlike the other three tracks on the digital album, "Wonder" is the only progressive house tune. The track has a peaceful and melodic feel within the five minutes of its duration.
In early January of 2013, Wavo and Dancing Astronaut hosted a remix competition for the song. The judges were Adventure Club themselves, who had chosen Luke Shay as the winning remixer of "Wonder".
"Wonder" categorized under the genre of progressive house, has a BPM of 123, with a total and exact length of four minutes and fifty-one seconds. The key the song was written in was A# major, as according to Beatport.