Hochosterwitz castle is a medieval fortress situated on a 172-meter high Dolomite rock in Carinthia, Austria. The castle was built in the 16th century and is considered to be one of the most impressive fortresses in Europe. Hochosterwitz castle was built by Count George Khevenhüller, who started the construction in 1570.

The castle has 14 gates, each with a unique name, which are located on the path to the main entrance. The main gate, called the "Lion's Gate", has a bridge over a 50-meter deep abyss that leads to the castle entrance. The castle has a unique design with a total of 14 towers and bastions, which were built to defend the castle.

Inside the castle, there are various rooms and halls that are decorated with artwork and armor from different periods. Some of the notable rooms include the Great Hall, which has a collection of historic weapons, and the Knights' Hall, which features a collection of antique furniture.

Visitors to the castle can also enjoy panoramic views of the surrounding landscape from the castle's ramparts. In addition to the castle, the Hochosterwitz Castle complex also includes a chapel and a restaurant. Today, the castle is open to the public, and visitors can take guided tours of the castle to learn about its history and architecture.