Most gardens close their gates when the monsoon comes. Korea’s National Arboretum is doing the opposite: this July and August, its guided “Hydrangea Hours” walks run only on rainy days.
The program, held in the Gwangneung Forest — a woodland preserved for over 560 years — centers on the summer garden’s hydrangeas: American varieties ‘Annabelle’ and ‘Pink Annabelle’ alongside Korean mountain hydrangeas, whose colors deepen and flower heads fill out in the rain. Guides also point out how summer wildflowers like the blackberry lily are structured to shed and channel rainwater — a small lesson in how plants engineer themselves for monsoon season.
The walks are free and open to anyone: on rainy days from Tuesday through Sunday, 10 a.m. to 4 p.m., sign up at the Forest Interpretation Center next to the arboretum’s ticket office. The arboretum is in Pocheon, about an hour northeast of Seoul.
Why it matters
Summer monsoon season is usually pitched as the worst time to visit Korea. This is a counter-programming gem for travelers already here in July and August — and a glimpse of how Korea’s public institutions are turning the rainy season itself into an attraction.
Source: Korea Forest Service (National Arboretum) press release (Korean), July 21, 2026, via korea.kr (KOGL Type 1). This article was produced with AI assistance and reviewed by a human editor.