The Vikos-Aoos National Park (Greek: Ethnikós Drymós Víkou-Aóou) is a national park in northeastern Epirus, Greece, and covers an area of 126 square kilometres. The park was founded in 1973, and encompasses the Vikos Gorge, the Aoos Gorge, Mount Timfi (with its highest peak Gamila, 2,497 m) and several Zagoria villages. The park is located north of Ioannina, south-southwest of Kastoria and west-southwest of Kozani.
The Vikos Gorge is listed as the deepest gorge in the world by the Guinness Book of Records among others. This follows a somewhat arbitrary definition of a gorge that excludes deeper features such as Colca Canyon because of their greater width:depth ratio. Nevertheless, with walls of up to 1 km in height, the 12 km gorge on the Voidomatis River is spectacular.