Located across the street of Gildong Ecology Park, Iljasan Mountain Herb Astronomy Park is a place for all ages consisting of nearby Iljasan Mountain Natural Park, jogging course, walkways, and an observatory deck.

Herb Astronomy Park derived the concept of its space from the idea of Heaven-Earth-Human, and reflected it in creating the outer space (Jamiwon, Taemiwon, Cheonsiwon, horoscope, and the Galaxy).

The facilities and trees in the park are aligned in accordance with Yin-Yang and the Five Elements Theory.

On the east and west side of the park, there are observation decks where you can enjoy the sunrise (east) and sunset (west).

Those who visit the park at night may enjoy 282 lighting fixtures resembling constellations across the grounds of the park, changing in colors from moment to moment.

This floor lighting presents an astronomical map that is 75m in diameter on the grounds of the park; from both observatories, visitors can see various constellations, including Polaris and Altair and Vega.

This is a great setting for couples going on dates.