Photo by NM1488, via Wikimedia Commons (CC0)
🇸🇮 Slovenia · Styria (Štajerska)
♨ Temperature
36°C
⛰ Altitude
—
⚗ pH
—
💧 TDS
—
🌊 Flow rate
—
📅 Established
First documented 1403; developed as a health resort from 1582
✓ Verified on 2026-07-31
Dobrna, in the valley of the Dobrnica stream in Styria, is one of the oldest documented spa towns in Slovenia, first mentioned in 1403 and developed as a health resort from 1582, with its first purpose-built bath house dating to 1624. The spring water reaches about 36°C, carries roughly 3.4% dissolved CO2, and is weakly radioactive — a combination that, alongside locally sourced peat and fango mud, gives Terme Dobrna three natural healing agents officially recognized by Slovenia's Ministry of Health. A new deep thermal source was located after the Second World War at 490–525 meters, nearly doubling the resort's water supply. Napoleon's brother Louis Bonaparte is recorded as a visitor in 1810–1811.
First documented in 1403, Dobrna developed as a formal health resort from 1582 and built its first dedicated bath house in 1624, making it one of Slovenia's oldest continuously operating spa towns. French Emperor Napoleon's brother, Louis Bonaparte, is recorded as a guest in 1810–1811.