Jinhae is a small town in South Gyeongsan province known primarily for its Cherry Blossom festival held every year approximately in early April. There are possibly more cherry blossom trees to be seen here than in any other location in Korea, and although there are a couple of popular, groomed places for visitors to see them, you can find them strewn throughout the hillsides surrounding the town.
There are buses from many locations in South Korea to arrive at Jinhae. Seoul's Gangnam Bus Terminal offers a few buses a day, which take about four hours to arrive in Jinhae. Busan's Bus Terminal offers buses every 15 minutes, and the ride takes approximately 45 minutes to arrive in Jinhae. Another option is to take a bus from Seoul to Changwon, the capital of the province, and take local bus 151 to the destination. For this, it helps to know some Korean, and to have keen eyes to find the bus stop, which is located to the right of the entrance of Changwon bus terminal and around the corner. If you choose this option, you will want to get off at the Jinhae high school bus stop.
The main thing to see in Jinhae is the cherry blossoms every spring. There are two primary locations that visitors go to see them. One is the train tracks just next to the high school that is a major bus stop. If you wait long enough, trains will come through this spot at a very low speed, making some idyllic photo shots as they roll through the cherry blossom lane.
The other location is at a river in the downtown section of Jinhae, located a 30 minute walk north of the bus station. At this location there is a small stream lined with cherry blossom trees on both sides that tourists are sure to be flocking around.