Balneario de Marmolejo Historical milestone · Marmolejo, Campiña de Jaén, Jaén The medicinal waters of Marmolejo, already documented in 1781 by the French physician Tissot, gave rise to a spa that reached its heyday in the 19th century; the first inn for spa-goers opened in 1875. 1875 Photo: J.Arévalo (CC BY 2.0) What to see and do in Marmolejo