Viewing and Managing iTunes Downloads I am on iTunes 12.5.1.21 on OS X El Capitan 10.11.3. I would like to know where (by default) downloads are written (I am downloading many iTunes U lectures in sequence).

Window > Activity shows me active downloads which I can pause and cancel, but that isn't exactly what I need.  I can also click the tiny arrow at the top right of the iTunes navbar that shows up when you are downloading something, but it just gives me the same tools as Window > Activity.
Two other easy options to find where an iTunes file is downloaded:

(1.) Locate the file in your libary, right-click it, select "Get Info" and go to the "File" tab to see the full path.

(2.) Locate the file in your libary, right-click it, select "Show in Finder" if, for example, you want to play the media in a different application.