Opera composers sometimes wrote instrumental intermezzi as connecting pieces between acts of operas. In this sense an intermezzo is similar to the entr'acte (intermission). The most famous of this type of intermezzo is probably the intermezzo from Cavalleria Rusticana, by Pietro Mascagni..
Here is a video of landscape images of Tuscany, Italy set to the music of the intermezzo from this opera wriitten by Pietro Mascagni.
