One of three hotels in the Hotel Castilla Termal Spa series, this gorgeous 4-star thermal spa lies half an hour from Valladolid in northwest Spain. Established in the ruins of a 12th-century Mudéjar Sancti Spiritus convent, the Balneario de Olmedo thermal resort offers more than just total relaxation. There is an indoor pool constructed in the old cloister leading onto another just outdoors. This beautiful 8-centuries-old convent has been adapted and enhanced by the addition of two spectacular modern buildings, allowing the hotel to offer 82 rooms for guests, including three junior suites. The unique environment offers a more widely encompassing idea of well-being, one that comes from more than simply the spa, as is a key part of Hotel Castilla's ehtos.