Chitterlings - pig intestines (pronounced 'chitlins): a favorite dish in the south of the US. They stink to high heavens but reportedly taste wonderful. I wouldn't know: the smell discouraged me from trying.
Lots of British people buy kebabs late at night when they are drunk......:-)
I found goat lungs are surprisingly good if prepared right, likewise, heart, liver and kidneys. Tripe boiled in milk and served with garlic, vinegar and chilli is really good. I helped to slaughter and butcher sheep for a traditional feast (kirban) in Bulgaria. Every part of the animals went in the soup except skin, hooves and bladder. Small intestines can be cut into sections, and turned inside out on a stick to make them easier to clean.
I come from England, New Zealand and Australia. The main internal organs we eat are liver and kidneys.
Lamb's liver is preferential. We usually fry this with bacon to make a casserole. Kidneys are chopped and mixed with beef to make a "steak and kidney" pie. The Scots will use lungs and other bits and pieces to make their famous Haggis. Also eaten (although I dislike) with gusto by some is tripe which is stomach lining. Also sweetbreads which I think are neck glands - not 100% sure about that.