For a day trip out of Seoul, the Suwon Hwaseong Fortress is nicely located just an hour out of the city by subway. I love how you can get so far with the Seoul metro system. The Suwon Hwaseong Fortress is a beautiful place for a nice, historical walk.
From the fortress, you can see the cities of Suwon and Hwaseong that surrounds both sides of the wall.
And despite being completely surrounded by the urban development of the city, you can find these spots of tranquil and natural sights. Absolutely beautiful.
Suwon is connected to Seoul by the number one subway line. From the subway, you’ll have to take one of the buses to the fortress.