Donegal Castle is a historic castle located in Donegal Town, Ireland. Built in the 15th century by the O'Donnell clan, it served as a stronghold and residence for the local chieftains. The castle features a mix of architectural styles, reflecting its long history and various renovations. The castle is situated along the River Eske and is surrounded by beautiful landscapes. Today, it is a popular tourist attraction, offering visitors a glimpse into Ireland's medieval past. Guided tours provide insights into the castle's history and the significance of the O'Donnell family in the region.