If you are watching When the Camellia Blooms and want to visit the location where the Camellia bar is, then you need to visit the historic district of Guryongpo which is a town in Pohang (which is in the North Gyeongsang province). It is located on a historic street called the Guryongpo Modern Culture and History Street.
In 1923, during the time of Japanese occupation, Japan built the Guryongpo port which turned Guryongpo into the largest fishery base in the East Sea region. Japanese fishermen started to flock to Guryongpo which turned Guryongpo into a tiny Japan. There were a lot of restaurants, stores, hospitals, Inns, and residences there, which still fill the streets of the historic district.
After Japanese occupation ended, several of the Japanese buildings where demolished or fell into disrepair which sparked a preservation effort so occupational history would not be forgotten. So in 2011 an entire street in the area was preserved by the Korean government and turned into Guryongpo Modern Culture and History Street. This is the street that the Camellia Bar sits on as well as the street where the market ajummas work.
So, this street that we see in When the Camellia Blooms carries a lot of history with it, goodness! Of course, it looks different in the drama as they remove a lot of the tourist signs while filming in order to help us better sink into the world of Camellia, which does feel, to me, like it own little quiet place in Korea.
Images from Naver