Let's Go Yulpo Seawater Green Tea Center Boseong County’s Yulpo Seawater Green Tea Center has typical public baths, saunas, playrooms for kids, open-air baths, and pools. For all of these, you only have to pay the admission fee for the public bath. For children under 7, the fee is W5,000. It is W7,000 for older children and adults. This place has pools with seawater pumped from 120 m underground and green tea. You can enjoy a healthy bath and play in the pools.