Seoul is known for its many spas and bathhouses, and a rainy day is the perfect time to indulge in some relaxation. Dragon Hill Spa is one of the most popular, with a variety of saunas, hot tubs, and even a movie theater. If you're looking for something a little more upscale, head to the Park Hyatt Seoul's Lumi Spa & Fitness. With a variety of treatments and a stunning view of the city, you'll leave feeling refreshed and rejuvenated.