On a recent recital at the University of Iowa I performed Bydlo, from Pictures at an Exhibition. In the orchestral version (orchestrated by Ravel) this solo part is played on either tuba or euphonium. It was probably first played on a high-C French tuba (a step above the Bb euphonium), so among common instruments today the euphonium is a very logical choice to play it.

Much as I did with my arrangement of the March from Holst's Second Suite, I have arranged Bydlo for euphonium and piano so we all have a chance to play it more often! The arrangement is available now from Cimarron, and the price is reduced until May 1 from $17 to $12:
http://www.cimarronmusic.com/search.cfm?ID=2483

Here is the video of my performance of this arrangement: