meddle
A music album, which contains one of the longest songs "Echoes" in it, which checks in at almost 24 minutes long. Other songs include "One of these Days","A Pillow of Winds","Fearless","San Tropez", and "Seamus". Echoes is especially enjoyable if you listen to it during the end of the "2001: a Space Odyssey", (mute the movie, of course), smoke a bowl and relax, completely.