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
Jethro Tull - Thick as a Brick. Except for the flip, it's one song that's 43:50.
Beethoven's 9th -- there used to be a rumor that the maximum capacity of CDs was picked so that all of Beethoven's 9th could fit on 1 CD. Also, many operas are several hours long -- ever fallen asleep during a Wagner performance, awoken a half-hour later and felt like you never left?
Why don't you use an iPod or iTunes. You can make your own mix and play for hundreds of hour non stop.