The walls of the pyramid room are set at a 52-degree angle, "which has been said to be the easiest angle to collect energies from the universe," according to the spa.
The SEV room "radiates electrons from SEV" meant to "metabolize your body rapidly."
The theme rooms are fun to take pictures in.
The downstairs snack bar serves bingsu (a beloved Korean shaved ice dessert) and various vinegar drinks said to be good for the skin.
Customers can take the snacks and eat them all around the bathhouse.
Upstairs there's a restaurant and cafe run by chefs from the Westin Chosun Hotel.
Alcohol consumption is limited to 500 ml per person, to prevent sauna accidents and overly rambunctious parties from disrupting the austere atmosphere.
My favorite spot in the spa is the outdoor rock pool in the women-only bathing area.
I soaked under its sodium bicarbonate waterfall for a good 20 minutes before my appointment with the seshin ajumma (scrub ladies) in the scrub room.
For 25 minutes I beached myself on a plastic slab, and gave myself over to the capable hands of a professional scrubber.
Clad in black bras and panties (standard scrub uniform), she scoured my entire body with two loofahs.
"Young ladies are the most sensitive," she said in an amused voice when I squeaked a little. "The older ladies always ask for the hardest pressure."
I emerged red and raw, but wonderfully clean.
It was the best extra ?20,000 ($18) I've ever spent in spa.
Next time I'll plan on three hours for a visit.
Make that four.
Spa Land, Centum City, 35 Centumnam-daero, Haeundae-gu, Busan, South Korea; +82 51 745 2900; open daily, 6 a.m.-midnight