Abundant mineral water resources prompted to give Birštonas a significant place in resort architecture history of Soviet Lithuania. There were two sanatoriums established here in 1947 (renamed “Tulpė” and “Spalis” in 1959 and later merged into one in 1975). However, based on then dominant “recreation organization principle of building large resort and recreation systems, and thus organizing mass public recreation”, the resort was to be expanded. 

In 1984 Birštonas had already had a capacity of “16 thousand. The resort had a park of climate therapy and therapeutic physical culture. In cooperation with the Department of Infectious Diseases of the Faculty of Medicine of Vilnius University, there was a division for patients who had suffered from viral hepatitis opened in “Spalis” Sanatorium. The sanatorium also had a branch of the Resort Research Laboratory of the Republican Council of Lithuanian Trade Unions for Resort Management.

Architecturally and urban-wise, Sanatorium “Versmė” is probably the most prominent component of resort's development. It was opened in 1975 and belonged to the Republican Unification of Recreational Institutions of Agricultural Workers. It treated digestive system and joint diseases. The institution gradually expanded with new buildings being added. Architecturally, the most expressive is the central building which illustrates the Soviet modernist style.

Vaidas Petrulis