Opened in 2015, the museum tells the story of the sanatoriums built in Valtellina during the 20th century to fight tuberculosis thanks to the pure air and sunshine of the Alps.

A collection of period objects and images testifies to the birth and activity of the former Sondalo Sanatorium Village, now the "Eugenio Morelli" hospital.

The Sanatorium Museum is divided into three parts in particular:
- The first part is devoted to tuberculosis, which, between the 19th and 20th centuries, took on the characteristics of a real social emergency;
- The second part deals instead with treatment and sanatoriums;
- The third and final part deals with the Sondalo Sanatorial Village, which functioned as a sanatorium from 1946 to 1971, when it was converted into a hospital.

Moreover, the sanatorium village is considered a masterpiece of "rationalist" urban planning, whose exceptionally interesting values lie in the design and overall aesthetic quality of the citadel; in the innovative technical solutions, designed ad hoc to respond to climatic conditions; and in the integration of different functions (including aesthetic-recreational ones, embodied in the large and beautiful Park) in avolumetric and scenic harmonization of great visual impact.