Dudince spa: carbon dioxide–sulphur water and the Roman Baths

Dudince is the smallest town in Slovakia (about 1,400 inhabitants) and the southernmost Slovak spa. It lies at 144 m in the valley of the Štiavnica stream, where the Štiavnica Mountains, the Krupina Plateau and the Danube Lowland meet, about 15 km north of Šahy. The spa boasts the most sunny days of any Slovak spa, and its main treasure is warm mineral water that combines carbon dioxide with hydrogen sulphide. This combination is rare, and it is what allows the heart and blood vessels, the joints and the nerves to be treated in a single course. The village is first mentioned in 1284, the hot springs in 1551, and Dudince became an official spa in 1983. The spa is run by the joint-stock company Kúpele Dudince, a.s., which operates three treatment houses: Rubín, Smaragd and Minerál.

Mineral waters and natural resources

Dudince water is a natural, highly mineralised healing water – carbonated, sulphidic, bicarbonate-chloride and sodium-calcium, slightly acidic. It emerges at about 27 °C with almost 5.5 g of minerals per litre; it is rich in carbon dioxide (1,350 mg/l), contains hydrogen sulphide and has raised levels of fluoride, lithium and boron. The water has been reaching the surface for thousands of years and depositing limestone: the spa park has natural travertine mounds of the Kúpeľný, Hostečný, Tatársky, Očný and Šípková Ruženka springs, each with an information board. The most interesting spot is the Roman Baths (Rímske kúpele, Močidlá): some 32 small pools carved into travertine, through which the water once cascaded from one to the next. Legend says the lower pools served soldiers and the upper ones their commanders; later hemp was retted in them. The water blackens silver, so take off jewellery before bathing.

What is treated

The spa treats adults (18+) in four groups of indications: cardiovascular diseases (high blood pressure, coronary heart disease, the state after a heart attack, vascular disease), nervous system disorders (nerve pain, polyneuropathy, after-effects of stroke), musculoskeletal disorders (joints, spine, arthritis) and occupational diseases. Carbon dioxide dilates the skin vessels and helps lower blood pressure, while sulphur absorbed from the water acts on connective tissue and reduces pain. The core of treatment is mineral baths in individual tubs and in a sitting mineral pool, followed by a dry wrap. They are complemented by underwater massage, pearl baths, the Biovak dry carbon-dioxide bath, peat wraps, magnetotherapy, laser, local cryotherapy, inhalations and therapeutic massage – almost 70 procedures in all. Treatment is prescribed by a doctor; some procedures can also be booked without a stay according to the 2026 price list.

Pools and wellness

The mineral pool in the Rubín treatment house (8.4 × 7 m, 1.1 m deep, 34 °C) is a sitting pool: you do not swim in it but sit quietly for up to 30 minutes. Out of season it opens to the public on Sunday afternoons, for adults over 18 only. On the same floor is the Wellnea Vital World – a whirlpool at about 32 °C, dry and steam saunas, an infrared sauna and a tepidarium with salt walls; visitors who are not staying can come from Monday to Thursday in the afternoon and evening, and the saunas are for over-15s. In summer, from June to mid-September, the Dudinka swimming area is open, named after a fairy from a local legend: a 25-metre pool (26–28 °C), a pool with attractions and slides, a children's pool (30 °C) and a sitting mineral pool with Dudince water (33–34 °C, from 15 years, for a supplement). In 2026 it closed on 16 September and will reopen in summer 2027.

Practical information

Dudince is on road I/66 (E77) between Zvolen and Šahy, and the Zvolen–Čata railway runs through the town. Free parking is about 150 m from the swimming area, and the treatment houses are 300 m from it. Two or three hours are enough for the mineral pool and the sauna; with a walk through the park to the travertine springs and the Roman Baths, allow half a day. Entry to the Rubín pool is via the Wellnea reception on the first floor (block G). Opening hours and prices are summarised in the "At a glance" box.

Nearby: trails, a pool, mountains

The Dudince – Mladá Hora trail starts right by the spa park and leads among the vineyards of the Krupina Plateau. In summer you can also head to the Margita-Ilona thermal swimming area near Levice, and north of Dudince rise the Štiavnica Mountains with their mining reservoirs, such as Počúvadlo — historic mining lake below Sitno.

Official website: kupeledudince.sk

Photos: Peter Zelizňák, CC BY-SA 3.0, Wikimedia Commons; RG68, CC BY 3.0, Wikimedia Commons; Szalay3, CC BY-SA 3.0, Wikimedia Commons.