This is a neat idea:
Mini-gardens have become synonymous with urban regeneration projects in Seoul. Some, like the new solar garden at Jonggak Station on Seoul Metro Line 1, are popping up underground.
Korea Times
The solar garden ― small but claimed to be the world’s first solar-powered subterranean park ― opened in an underground passageway at Jonggak Station last Friday, placed right in front of the Jongno Book Store and a row of booths selling handcrafted goods made by young artists.
Mandarin trees and verdant bushes grow under natural sunlight, emitted from eight ceiling apertures connected to light-collecting dishes installed directly above at Jongno Tower Square on the ground. The ceiling is dotted with backup LED lights used at night or on cloudy days.
You can read more at the link.
This photo taken on Oct. 17, 2016, shows the rooftop garden of the Sejong Government Complex in Sejong, south of Seoul, that went on the Guinness World Records as the world’s biggest among its peers. The garden sits atop bridge-connected structures, measuring 3.6 kilometers in length and 79,194 square meters in space. (Yonhap)
