Question: What region whose name means "Estate of the Salt Chamber" has Austria's third largest lake?

full_context: Document 1: Wels: Wels (] ) is a city in Upper Austria, on the Traun River near Linz. It is the county seat of Wels-Land.
Document 2: Wachau wine: Wachau is one of Austria's most established and notable wine regions, specializing in dry wines made from Riesling and Grüner Veltliner. Located in Lower Austria along the Danube, west of Vienna and Krems an der Donau, it is one of the westernmost wine producing regions in Austria with only a few scattered plantings in Tyrol being further west. While most of Austria follows a wine classification systems based on ripeness and harvest must weight that parallels the German wine classification system, Wachau wines have a unique classification system. The three classification levels for Wachau wine include "Steinfeder" for wines up to 11.5% alcohol level, "Federspiel" for wines between 11.5–12.5% and "Smaragd" that must have a minimum of 12.5% alcohol level. Despite its renown, the Wachau is a small wine region that usually accounts for only around 3% of Austria's wine production.
Document 3: Tauern Railway: The Tauern Railway (German: "Tauernbahn" ) is an Austrian railway line between Schwarzach-Sankt Veit in the state of Salzburg and Spittal an der Drau in Carinthia. It is part of one of the most important north-south trunk routes ("Magistrale") in Europe and also carries tourist traffic for the Gastein Valley. The standard gauge railway line is 79 km long and climbs the High Tauern range of the Central Eastern Alps with a maximum incline of 2.5%, crossing the Alpine crest through the 8371 m long Tauern Tunnel. It is one of the highest standard gauge railways in Europe and the third highest in Austria.
Document 4: Linz: Linz ( ; ] ; Czech: "Linec" ) is the third-largest city of Austria and capital of the state of Upper Austria (German: "Oberösterreich" ). It is in the north centre of Austria, approximately 30 km south of the Czech border, on both sides of the River Danube. The population of the city is , and that of the Greater Linz conurbation is about 271,000.
Document 5: Pichl-Kainisch: Pichl-Kainisch is a former municipality in the Salzkammergut in the Liezen (district) Austrian state of Styria. Since the 2015 Styria municipal structural reform, it is part of the municipality Bad Mitterndorf.
Document 6: Salzburg: Salzburg (] ; Bavarian: "Såizburg" ; literally: "Salt Fortress") is the fourth-largest city in Austria and the capital of the federal state of Salzburg.
Document 7: Windermere: Windermere is the largest natural lake in England. It is a ribbon lake formed in a glacial trough after the retreat of ice at the start of the current interglacial period. It has been one of the country's most popular places for holidays and summer homes since the arrival of the Kendal and Windermere Railway's branch line in 1847. Historically forming part of the border between Lancashire and Westmorland, it is now within the county of Cumbria and the Lake District National Park.
Document 8: Salzkammergut: The Salzkammergut is a resort area located in Austria. It stretches from the City of Salzburg eastwards along the Austrian Alpine Foreland and the Northern Limestone Alps to the peaks of the Dachstein Mountains, spanning the federal states of Upper Austria, Salzburg, and Styria. The main river of the region is the Traun, a right tributary of the Danube. The name "Salzkammergut" literally means "Estate of the Salt Chamber" and derives from the Imperial Salt Chamber, the authority charged with running the precious salt mines of the Habsburg Monarchy. It is a UNESCO World Heritage Site.
Document 9: Attersee (lake): Attersee, also known as Kammersee, English sometimes Lake Atter, is the largest lake of the Salzkammergut region in the Austrian state of Upper Austria. It is Austria's third largest lake by area, surpassed only by Lake Constance and Lake Neusiedl, which, however, both extend beyond national borders.
Document 10: Styria: Styria (German: Steiermark , ] , Slovene/Croatian: "Štajerska" , Hungarian: "Stájerország" , ) is a state or "Bundesland", located in the southeast of Austria. In area it is the second largest of the nine Austrian federated states, covering 16401 km2 . It borders Slovenia and the Austrian states of Upper Austria, Lower Austria, Salzburg, Burgenland, and Carinthia. The population (as of ) was . The capital city is Graz which had 276,526 inhabitants at the beginning of 2015.
Document 11: Coniston Water: Coniston Water in Cumbria is the third largest lake in the English Lake District. It is five miles long by half a mile wide (8 km by 800 m), has a maximum depth of 184 feet (56 m), and covers an area of 1.89 sqmi . The lake has an elevation of 143 feet (44 m) above sea level. It drains to the sea via the River Crake.
Document 12: Bad Gastein: Bad Gastein (formerly "Badgastein") is a spa town in the district of St. Johann im Pongau, in the Austrian state of Salzburg. Picturesquely situated in a high valley of the Hohe Tauern mountain range, it is known for the Gastein Waterfall and a variety of "Belle Époque" hotel buildings.
Document 13: Tauern Railway Tunnel: The Tauern Railway Tunnel (German: "Tauerntunnel" ) in Austria is the longest tunnel of the Tauern Railway crossing the main chain of the Alps. Currently, it has a length of 8.371 km . The highest point of the tunnel, which is also the highest point in all of the railway line, is at 1226 m above sea level. The tunnel's north entrance is at Böckstein in the valley of Bad Gastein in the state of Salzburg, the south entrance near Mallnitz in Carinthia.
Document 14: Qinghai Lake: Qinghai Lake (), Kokonor (Mongolian: Хөх нуур ) or Tso Ngonpo (Tibetan: མཚོ་སྔོན་པོ། ) is the largest lake in the People's Republic of China. Located in Qinghai province on an endorheic basin, Qinghai Lake is classified as a saline and alkaline lake. Qinghai Lake has a surface area of 4317 km2 ; an average depth of 21 m , and a maximum depth of 25.5 m as measured in 2008. The current Chinese name "Qinghai," the older Mongolian name "Kokonor", and the Tibetan name translate to "Green Sea", "Blue Lake" and "Teal Sea", respectively. Qinghai Lake is located about 100 km west of the provincial capital of Xining (Tib:Ziling ཟི་ལིང་།) at 3205 m above sea level in a hollow of the Tibetan plateau. Twenty-three rivers and streams empty into Qinghai Lake, most of them seasonal. Five permanent streams provide 80% of total influx.
Document 15: Blau (Danube): The Blau (] ) is a 15 km long river in Baden-Württemberg, southern Germany, and a left tributary of the Danube. The source of the Blau is the karst spring of "Blautopf", in the town Blaubeuren, in the Swabian Jura. It flows east through Blaustein to the city of Ulm, where it empties into the Danube.
ground_truth: Salzkammergut