Thal (German pronunciation: [ˈtaːl]) is a village in the Austrian state of Styria, about 3.2 kilometres (2.0 mi) west from the edge of Graz, Austria's second largest city.

Thal is a scattered settlement of houses, consisting of about 19 grouped hamlets: Eben, Eck, Hardt, Haslau, Kirchberg, Kötschberg, Linak, Oberbichl, Oberthal, Plabutsch, Schlüsselhof, Steinberg, Unterbichl, Unterthal, Waldsdorf, Waldsdorfberg, Wendlleiten, Windhof, and Winkel.

The artistic design of the entire complex with bright colors and shapes and impressive lighting effects received critical acclaim.

By the 12th century, the lords of Waldsdorf had established their seat on the site of the present stately home in the shape of a fortified manor house with a large dairy farm.

In 1563, major conversion and renovation work was carried out on the castle under the then-owner and designer, Erasmus of Windisch-Graetz, which saw it expanded into a Renaissance style stately home with a courtyard surrounded on three sides by three-storey high, columnar arcades.

During the rule of Sigmund Frederick the Younger of Trautmannsdorff, Oberthal House was converted and expanded between 1656 and 1661 into one of the most splendid in the area around the state capital.

Above the house, a large pleasure garden (Lustgarten) was established, based on French prototypes, surrounded by a wall and decorated with grottos and a small maison de plaisance.

Thal Castle was first mentioned in the records in 1259, having been built on a hillock between the present parish church and the lake of Thalersee, probably at the beginning of the 13th century.

Numerous exhibits show his remarkable career, including his most important stages of life like his childhood and adolescence, becoming the world's best bodybuilder, a worldwide star, and the Governor of California.