The Khust Castle is an abandoned castle located in the city of Khust in Zakarpattia Oblast in western Ukraine.
The former Hungarian castle lays on a 150-meter high mountain near the center of the city.
The construction of the castle is believed to have started around 1090, during the reign of the Hungarian King St. Ladislaus I and it was finished in 1191, under the Béla III.
The castle was built as a fortress to protect the salt road from Solotvyno, including the Khust Gate, and the border areas.
The Turkish traveler Evliya Çelebi mentions the castle: "The Khust castle is located at the top of Mount Hassan. Its walls are high and thick, and with its power it is similar to the Iskander fortress, because its height already reaches the sky. Residential buildings facing east face one above the other. The roofs of the palaces are covered with colored tiles, the roofs of the churches - iron, the crosses on them - of pure gold and so shine that the one who looks at them gets tired eyes and is forced, with respect for them, to lower their gaze."