Kamianets-Podilskyi Castle is a medieval fortress located in Kamianets-Podilskyi, Ukraine. It is one of the largest and most well-preserved castles in Eastern Europe, with a rich history that dates back to the 14th century.

The castle was built by the Lithuanian prince Gediminas in the early 14th century to protect the region from the invading Tatars. Over the centuries, it was expanded and fortified by various rulers, including Polish kings and Ukrainian hetmans.

The castle consists of several interconnected buildings and towers, surrounded by a moat and a defensive wall. It was built using a combination of stone, brick, and wood, and is known for its unique architectural style that combines Gothic, Renaissance, and Baroque elements.

Throughout its history, the castle was the site of numerous battles and sieges, and was occupied by various armies and factions. It was also used as a prison and torture chamber during the Soviet era.

Today, the Kamianets-Podilskyi Castle is a major tourist attraction and a UNESCO World Heritage Site. Visitors can explore the castle's many chambers and towers, walk along the defensive walls, and enjoy panoramic views of the surrounding countryside. The castle is also home to a museum that showcases its history and architecture, as well as various cultural events and festivals throughout the year.