Bass Canyon is a submarine canyon located on the edge of the continental shelf off the coast of eastern Victoria, Australia, within Bass Strait, approximately 90 kilometres (56 mi) southeast of Ninety Mile Beach, Lakes Entrance. The canyon descends to depths exceeding 3,000 metres (9,800 ft), making it one of the deepest submarine canyons off the Australian coast, one of the largest in the world, and among the most impressive modern submarine canyon systems. The exact age of the canyon is debatable as the precise timing of its formation remains uncertain.
Source: Wikipedia ↗
The festival takes place at Gorge Amphitheatre · George, WA in United States.