Though technically in neighboring Seocho District rather Gangnam proper, this large riverside park is close enough to warrant a visit. Lazily stroll along the river walk, check out the Banpo Bridge Rainbow Fountain (which, at 570 meters/1,870 feet long is the largest bridge fountain in the world), rent a bicycle, or picnic on the grass. In the warmer months (April through October) the park hosts the Bamdokkgaebi Moonlight Market every Friday and Saturday night from 6 to 11 pm. This popular event attracts people from all over the city to browse the artist's stalls and graze on food truck fare, featuring Korean classics such as tteokbokki (rice cakes in sweet spicy sauce), along with foreign favorites like tacos, hot dogs, and Cuban sandwiches. The trio of man-made floating islands known as Some Sebit are also not to be missed. Each features a building lit-up at night by multi-chromatic LED lights and are constructed to represent the three stages of the life of a flower. Inside you can find two restaurants, a cafe, and an outfit renting six-person "Tubester" boats.