The mineral springs — technically a combination of sodium chloride, calcium, and magnesium salts — are the reason Druskininkai exists as a town rather than as a village. Several springs are marked and accessible in the spa district, which occupies the centre of town. The most prominent is a dedicated drinking spring where visitors can fill cups with the slightly salty water and experience for themselves the mineral content that made this place famous.
The spa district around the springs retains some of the 19th-century character that the Soviet period tried to overlay: wooden villa architecture, tree-lined walking paths, and a slightly formal park layout. Several wellness centres and sanatoriums cluster here, offering everything from traditional mineral baths to modern hydrotherapy treatments. Grand Spa Lietuva is the largest facility, but smaller, less expensive options are available throughout the district.