Juvenex Spa

An unassuming Koreatown building is home to this huge, soundproof, round-the-clock oasis. Shy gals take note: Nudity is encouraged in the communal areas, full-body scrubs are executed in shared, barely screened-off spaces, and the spa goes unisex after 7pm. The facilities are impressive, though; lolling in one of the igloo-like saunas, made from 20 tons of jade stones and infused with Chinese herbs, is said to increase metabolism, improve circulation and detox the body. A basic Purification program costs $115.