Bukhansan National Park
The park was established in 1983 -- Korea’s fifteenth national park -- with an area of 50 square miles (80 square kilometers) spreading over Seoul and nearby Gyeonggi-do province and surrounded by urban areas. The park has everything from easy hiking trails to granite peaks, so day hikers, free climbers and everyone in between can find that perfect trail.
If you plan to stay in the park for multiple days, you can choose between camping or staying in modest mountain lodges. Both fill up quickly during the summer and on weekends and national holidays, so book your spot online before you go to ensure you have a place to sleep.