Onsu Urban Natural Park (Jatjeol Park)

Onsu Urban Natural Park spans Yangcheon-gu and Guro-gu in the southwestern part of Seoul, and borders Bucheon-si in Gyeonggi Province. It is easily accessible, adjacent to Gyeongin National Road to the south, Nambu Beltway to the east, and Gyeongin Expressway to the north. Designated as a park in 1971, it is a typical natural park with well-preserved diverse vegetation, used by approximately 180,000 citizens annually. Along the hiking trails, there are mineral springs, badminton courts, fitness areas, rest facilities such as benches, and exercise equipment like pull-up bars and waist twisters installed in various spots, receiving positive responses from many visitors. Jatjeol Park, created within Onsu Urban Natural Park, features a pond and deck, offering a cool sensation in summer, and an annual firefly release event is held.