Buk-Gu, whose name translates to "Northern District", is one of the fifteen administrative zones which make up Busan. We spent a morning wandering around the area and checking out some of its touristic sights: the Fishing Village Folk Museum, a riverside park, and the Gupowaeseong Japanese Fortress.
Turns out that Busan is the kind of city which can have a giant mountain right in its center, topped by an ancient fortress, accessible by cable car... and it's not a big deal. We were shocked when we learned of the cable car up Mt. Geumjeongsanseong, and Busan was all "Oh yeah, that. I forgot about that." It doesn't even appear in the various "must-do" lists we've read for Busan, while in most other cities it would be the top highlight!