Heosimcheong Hot Spring (Hanja: 虛心廳) is referred to as one of the better hot springs in Busan, the largest Hot Spring in Asia, and is therefore worth checking out. Located near Geumgang Park, it’s a great place to relax your muscles after hiking the mountain (even if you were lazy and took the cable car down!). Located at 32 Oncheonjangno 107beon-gil, Oncheon-dong 137-beonji, Busan Dongnae-gu, it is known to have been bathed in by kings of Silla, from King (Park) Hyeokgeose-Geoseogan to King (Kim) Gyeongsun [57 BCE – 935 CE], the spring has been developed into a 4,300 sq m urban complex with 4 million visits a year.
The current building was completed in 1991. Segregated and largely duplicated by gender, facilities include hot, lukewarm and cool baths, fountains, saunas (including an "igloo" chilled to 0°C), mud baths, massage, exfoliation, and exercise rooms. The spring water is alkali, emerging at 45°C to 56°C, and has the highest concentration of magnesium in Korea. Forty different bath types are available, depending on the season, with different medicinal herbs and fruit essences, including cherry, pepper, lavender and citrus, mixed with the water. The complex also has a nightclub, a lounge, several banquet halls, a bakery, a bar (Heosimcheong Bräu) and a Japanese restaurant, and is connected to a neighboring hotel by skywalk. This hot spring opens from 5:30 am to 10 pm.
Once at the building, go up the escalator and you’ll see the welcome sign. After accepting the 7,900 won entrance fee (you pay when you leave), get a key at the front desk, put your shoes in one locker, then walk into your gender’s changing / locker / shower room. The process is pretty similar at most jimjilbangs/spas – strip, shower, then enjoy the hot springs and hot water in all the ways they’re presented to you.
This particular place has a little bit of everything, at every temperature from COLD (like the shower when you first turn it on) to too-hot-to-handle. The scenery was equivalently beautiful – and facilities varied. Heosimcheong is accessible by using Busan Hümetro Line 1 to Station 127: Oncheonjang Station (Urideul Hospital)/온천장역 (우리들병원)/溫泉場驛 (우리들病院).