Longest continuous playing songs


I like (and looking for) continuous playing music, it could be one song or a group of songs that play uninterrupted, the longer, the better. Does anybody have any suggestions?

Thanks for any suggestions,

Steve
sc2
the Playin' in the Band from 5-21-74 @ Edmundson Pavilion , University of Washington, Seattle, WA is a whopping 46:27 of Psilocybin soaked protogalactic sound..
For great instrumental, contemporary rock try "The Earth Is Not A Cold Dead Place" by Explosions in the Sky.
Check out the music choice channels on cable. There are over 40 different music genres, and they play without interuption, going from one song to another. Day after day and year after year and they don't stop.