Yuldong Park (율동공원) is one of my favorite parks in and around Seoul. Although situated in Bundang, it's very close to Seoul and easily reachable by public transportation. Also, it's usually a bit cooler than the city, because it has a big lake and is surrounded by hills. It's perfect to spend your time on a lazy Sunday in summer.
There's a path all around the lake where you can take a stroll. The path is for pedestrians only and it is nice to not have to constantly watch out for bicycles or motorbikes trying to run you over. Walking around the lake gives you a sense of being far from the city, although the park is right next to it.
Just next to the path there's a cafe called Kona Queens, where they have Hawaiian coffee. It's a very peaceful place, since it is directly next to the lake. The building has two stories. You can sit outside on the terrace or sit inside next to the window and gaze upon the lake. The coffee is quite good too and reasonably priced considering the view you have here. It is a great place to sit a few hours and enjoy the scenery.
If you don't want to spend time at a cafe, there are other leisure options in the park as well. There's a big grass field with a book themed park on it, full of sculptures and other art inspired by literature. Here you can get your photography game on, since there are so many different sculptures you can use as prop for your shot. There's also a small library where you can read books, but I doubt they have English books there.
In addition to the art, there is also a big bungee jump tower where you can get your adrenaline fix. Or if you're afraid of heights like me, just watch people jump of screaming while you are safely on the ground eating a snack you just bought at the convenience store nearby. Anyway, if you do want to test your bravery, there's a first come first serve policy (no reservations) and there are some restrictions. See the picture below for the full details.
On the other side of the park there's a grass field as well. Also there is another convenience store with enough snacks and drinks to get you through the day. If you want something else than convenience store snacks, the employees of various chicken and pizza places handing out flyers have you covered. Don't want to eat chicken or pizza? There is a restaurant street just outside of the park with more options. Actually, the only thing you need to bring to this park is a mat and maybe a tent, if you are too late to take a spot in the shade.
If you have kids, Yuldong Park is a great place to bring them. In addition to the big grass fields, there are also two playgrounds with sand. Don't forget to bring their beach set though, because otherwise they'll be upset (I know that from experience).
How to get there
Go to Seohyeon Station (서현역) on the Bundang line and go out at exit 2. Don't get confused when it says Gate 4, because that is the shopping mall's numbering, not the subway station's. So it's both exit 2 and Gate 4. After exiting, turn left immediately and walk past the regular bus stop towards the local bus stop (마울 버스), which is a yellow and blue sign with 602 and 602-1 on it. Take bus 602-1 or 602-1C and get out at Yuldong Park. The bus will drop you off at the beginning of a big parking lot. Just walk over the lot towards a big stone stairs, climb it and you will be at the beginning of the park. Click here if you want to see a video with directions.
If you want to get to the restaurant street, you have to go all the way to the other side of the park. Just follow the path on your left and it will get you to the entrance on the other side.
145 Munjeongro, Bundang-gu, Seongnam-si, Gyeonggi-do (경기도 성남시 분당구 문정로 145 (율동), 분당동 일원)