Few people associate a wired city like Seoul with nature. However, South Korea’s capital is nestled amid 37 mountains, putting the great outdoors just a bus or subway ride away. Thanks to its location within the city, Bukhansan holds the Guinness World Record for the national park with the most visitors per square foot. You’ll find numerous trails of varying difficulty leading past temples, ancient fortress walls, waterfalls, and golden Buddha statues. The park is also home to Baegundae, Seoul’s highest peak, which offers a challenging but fun day-hike with a perfect picnic spot and bird’s-eye views of the sprawling metropolis.