"Come" and "come up", what's different between these two?
While "come" can be used for a variety of locations, "come up" generally refers to the visiting of one's home. In particular, it is often used in reference to homes that are far away, like holiday homes, country houses, or cottages. When the speaker says "come up," we can infer that the country home in question is located more north than their current location, hence why "up" is used here. You can use "down" the same way. Ex: We drove up to the cottage for the weekend. My parents came up too. Ex: Come up to our cottage this summer!