Hello! This is a pretty common phrase in English. “Up in [location]” or “Down in [location]” is a colloquial way of saying “at [that location]”. Often we say “up in [location]” if the location is North of the speaker, or “down in [location]” if the location is South of the speaker, but people use this very loosely. For example, I live in San Francisco, so I might say: “I’m spending the weekend up in Portland with my good friends” Or “My aunt lives down in Los Angeles”. If the location is close, we will often say “over to [location]”, as in: “My sister had a party so I went over to her house on Friday night” I hope that helps!