Therme Oberlaa, Thermal swimming center in Oberlaa, Vienna, Austria

Therme Wien is a thermal bathing complex in Oberlaa, in Vienna's 10th district, Favoriten, opened in 2010 beside the older Oberlaa spa centre. It covers about 75,000 m², with nearly 4,000 m² of water surface, a 3,000 m² sauna area, a 6,000 m² health zone and a 1,000 m² fitness area. A second spring was drilled to about 900 m depth in 2009 to supply the baths.

A hot sulfur spring was found at Oberlaa in 1934 during an oil test drilling and sealed again. From 1965 the city searched for it anew, and in October 1969 a provisional spa with 300 to 400 treatments a day opened by the Liesing. A second spring was tapped at about 900 m depth in 2009, and the new Therme Wien opened on 27 September 2010 beside the old Kurzentrum.

The name refers directly to the Oberlaa district of Vienna where the thermal baths sit. The sauna area draws many local visitors who come regularly, treating it less as a tourist attraction and more as part of their weekly routine.

The center sits close to the Oberlaa metro station and is easy to reach by public transit from central Vienna. Bringing your own swimwear and towel is a good idea, as rental options may not always be available.

The thermal water comes from a sulfur spring first struck in 1934 during an oil exploration bore on the right bank of the Liesingbach; the hole was sealed again for lack of interest. A second spring was drilled in 2009 to about 900 metres depth to expand supply. The original spring was only rediscovered in 1965 on behalf of the City of Vienna.