I could talk your ear off about pipe organs. When I was 17-21 me and a friend would would impersonate, cajole, smooth talk our way into churches to play their organs. My friend Jeff got his doctorate in pipe organ performance a few months ago. It still tickles me to see him at the top of Google image search when I look for him.
There is Sooo much great music for the instrument, but I will leave you with this. A well known fugue from Bach.
Notice how his fingers are curled up like a claw? That is because the keys are more like buttons than piano keys. Notice how the video looks out of sync? That is because the pipes are far away, and take time to hear.
It is a wonderfully challenging instrument.