I forgot most of my European geography. I learned it all in World History and AP Euro my freshman and sophomore year of high school, where we had to memorize the map of the world, get handed a blank map, and label each one. It was nuts. It was our first assignment of the year and we had a week to memorize.
So naturally I forgot all of it. I had a very dirty mnemonic for remembering Norway, Finland, Sweden area. I still chuckle.