Castilla Termal Burgo de Osma

A 16th-century university converted into a hotel, with guest rooms occupying what were once classrooms, their original stone walls and timber beams still intact. The central courtyard, now capped in glass, shelters the bar and restaurant in warm, diffuse light. Below stairs, a thermal spa fed by a nearby spring sits under Romanesque frescoes in vaulted stone chambers, which is either very atmospheric or very haunted, depending on your mood.