Stari bazen

Trieste area, Friuli-Venezia Giulia, Italy

Location: Trieste area, Friuli-Venezia Giulia, Italy
Water type: sulfurous
Temperature: 38 °C
pH: 6.5

Water profile

Thermicity

Neutral

38 °C

LowHigh

Soothing — neither hot nor cold, perfect balance.

Mineralisation

Bio-active

LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Stari Bazen — 'Old Pool' — is a historic thermal bathing pool in a geothermal area shared between Italy and its eastern neighbours, reflecting the historical boundary changes in the northeastern Adriatic and Istrian Peninsula that have resulted in shared thermal heritage between Italy, Slovenia, and Croatia. The designation 'old pool' (stari bazen in South Slavic languages) suggests a long-established bathing tradition predating modern spa development, likely drawing on sulphurous or mineral spring water from the karst limestone geology of the Istrian-Karst geothermal zone. The surrounding Istrian landscape, with its remarkable multilingual cultural heritage and the extraordinarily beautiful Adriatic coastline, provides a rich context for this historic thermal site.

Insider tip — This old pool, whose Slovenian name Stari bazen means simply old basin, sits near the Karst plateau at the Italy-Slovenia border, a region where Roman-era baths once operated. The sulfurous spring at 38°C rises through the distinctive pale Karst limestone, giving the water a soft mineral character. The cross-border location means the visitor mix is delightfully multinational. The Karst scenery of sinkholes and limestone pavements surrounding the site is unlike anywhere else in Italy.

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