It's located in the east part of Namsan Park, right beside Grand Hyatt Seoul. While many choose the west part of the park where you can hike up/ take a cable car to N Seoul Tower, this part is less visited. But more pretty! Don't expect greenhouses though - it's more like a park. Better to visit at night - it's actually more romantic to get a night view of Seoul from here than from the N tower. Some years ago on my birthday I had dinner at Hyatt and took a walk at this garden. The view from this garden was the best part of the night. A good date spot!
772-12 Hannam-dong, Yongsan-gu, Seoul, South Korea