Lee Young (Park Bo-Gum) and Hong Ra-On (Kim You-Jung) come here on their date in episode 19 of Moonlight Drawn By Clouds/Love in the Moonlight (구르미 그린 달빛) (KBS2, 2016).
Chilji Park [칠지공원] is located in the village of Sin-ri [신리] at the Baekma River opposite of Gudeurae Park [구드래조각공원]; around 3,5hrs south of Seoul by public transport. It is also Gudeurae Park that is usually mentioned as the filming site for this scene. In reality, the scene was filmed on the other side of the river at this park right here.
Address: 480 Sin-ri, Gyuam-myeon, Buyeo, Chungcheongnam-do
충남 부여군 규암면 신리 480
忠清南道 扶余郡 窺岩面 新里 480
Geolocation: 36.290688, 126.900886
— submitted by Marion KDL & Mich