1. The Han River (Hangang) is a landmark of Seoul, South Korea that flows through the city and is surrounded by beautiful parks, bridges, and attractions. The river is approximately 514 km long and runs from the eastern mountains of South Korea and flows into the Yellow Sea. Some interesting facts about the Han River include:

- The river has played a significant role in the development of Seoul, as it provided a water source for agriculture, transportation, and trade in ancient times.

- The Han River is a popular spot for locals and tourists to engage in water sports such as kayaking, canoeing, and paddleboarding.

- The river is home to over 20 species of fish, including carp, catfish, and eel.

- The Hangang Park area along the river is host to various events and festivals throughout the year, including the Seoul Lantern Festival and the Seoul International Fireworks Festival.

2. The Han River and its parks are open 24 hours a day, 7 days a week. There is no admission fee to enter the parks or access the riverside. For more information, you can contact the Han River Park Management Office at +82-2-3780-0601.

3. To get to the Han River, visitors can take the subway to one of the many stations near the river, including Yeouido Station, Ttukseom Resort Station, or Jamsil Station. There are also various bus routes that stop near the parks along the river.