Unused, aging card.  A Wikipedia article translated from Spanish tells us, in part:  “Duran Sanatorium was a sanatorium with all the characteristics of a first world hospital trained to house about 300 patients, located between the districts of Tierra Blanca de Cartago and Potrero Cerrado de Oreamuno.  It was created to house and treat patients suffering from tuberculosis, also known as the white plague.  This old property is located 7 km north of the city of Cartago and about 18 km southeast of the Irazu Volcano,…and was founded in 1918 by the Costa Rican physician and politician Carlos Durán Cartín (1852-1924), ex-President of the Republic.”  Grade: 1