- Source: Graduation tower
A graduation tower (occasionally referred to as a thorn house) is a structure, used in the production of salt, that removes water from a saline solution by evaporation, increasing its concentration of mineral salts. The tower consists of a wooden wall-like frame stuffed with bundles of brushwood (typically blackthorn) that have to be changed every five to ten years, as they become encrusted with mineral deposits over time. The salt water runs down the tower and partly evaporates. At the same time, some minerals from the solution are left behind on the brushwood twigs.
Graduation towers can be found in a number of spa towns, primarily in Germany but also Poland and Austria. The mineral-rich water droplets in the air are regarded as having beneficial health effects similar to that of breathing in sea air.
Large graduation tower complexes are located in Ciechocinek and Inowrocław, Poland. Ciechocinek's entirely wooden construction was erected in the 19th century by Stanisław Staszic. The complex consists of three towers, with a total length of over 2 km. Many tourists visit it for health reasons.
Gallery
Partial list of towns and cities with graduation towers
With years of initial construction where available. Does not include modern indoor facilities found in some spas.
France
Saulnot (16th century)
Arc-et-Senans (1775)
Germany
Bad Dürkheim (1736)
Bad Dürrenberg
Bad Essen
Bad Karlshafen (1986)
Bad Kissingen (16th century)
Bad Kreuznach (1732)
Bad Kösen
Bad Münster am Stein (1729)
Bad Nauheim
Bad Oeynhausen
Bad Orb (1806)
Bad Rappenau (2008)
Bad Reichenhall (1911)
Bad Rothenfelde (1777)
Bad Salzdetfurth
Bad Salzelmen (part of Schönebeck, 1756)
Bad Salzhausen (around 1600)
Bad Salzuflen (18th century)
Bad Salzungen
Bad Sassendorf
Bad Soden (part of Bad Soden-Salmünster, 2006)
Bad Sooden-Allendorf
Bad Staffelstein
Eibach (part of Dillenburg, 2004)
Hamm (2008)
Lüneburg (1907)
Rheine (Saline Gottesgabe)
Salzgitter-Bad (2009)
Salzkotten
Poland
Busko-Zdrój (since 2022)
Ciechocinek (three towers: 1824 to 1859)
Chorzów
Gliwice
Gołdap (since 2014)
Grudziądz (since 2006)
Inowrocław (since 2001)
Katowice (since 2018)
Konstancin-Jeziorna (since 1978)
Kraków (two towers: in Nowa Huta and Bagry districts, since 2021)
Latoszyn
Radlin (since 2014)
Radomsko (since 2022)
Rabka-Zdrój
Rymanów-Zdrój
Świnoujście (since June 2021)
Tarnów
Ustka (since July 2020)
Wieliczka (since 2014)
Wysowa-Zdrój
Żory (since 2023)
Ząbki (since 2022)
Romania
Baile Figa (2020)
United Kingdom
Ayr (2019)
References
External links
Media related to Graduation towers at Wikimedia Commons
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- Graduation tower
- Ciechocinek graduation towers
- Bad Dürkheim
- Puckeys Estate Reserve
- Ciechocinek
- Radlin, Silesian Voivodeship
- Salzkotten
- Count Skarbków Park
- Bad Dürrenberg
- John Paul II Park (Warsaw)
