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.
Set at the foot of the Baegyangsan Mountain in central Busan, Samgwangsa is a massive temple with enough room for 10,000 worshipers. And there were approximately that many present when we visited on a balmy May evening shortly before Buddha's birthday.
Haedong Yonggungsa (해동용궁사) is unique among Busan's Buddhist temples in that it lies not in the mountains, but on the seafront. It was founded in 1376, during the Goryeo Dynasty, and completely destroyed during the Japanese invasions. Though the current construction only dates from the 1970s, the temple is a beautiful and much-beloved center of worship. In fact, I can't imagine it being any more popular.