The Upana Cave system provides an awe-inspiring adventure for those who like to explore the interior of the earth. There are fifteen known entrances within the system. The combined length of cave passages is approximately 450 meters (1,475 feet).

The individual caves vary in size from single rooms to branching passages of considerable length. The overall passage and room dimensions are comparable with those of other Vancouver Island caves. Dress warmly, as these caves, the deepest north of Mexico, extend more than 2,000 feet (610 m) into the honeycombed limestone rock. You can take a self-guided tour through a network of caves or join a guided tour.

For an even deeper adventure, join a guided tour of the "White Ridge" caverns. Cavers named the system for the river that flows through one of the caves. The underground sequences of the television series, Huckleberry Finn and His Friends, were filmed at the cave - Gold River is home to the B.C. Speleological Association. There are about 1,050 known caves on Vancouver Island. Most of these caves are found in the Quatsino Formation limestone deposits of Northern Vancouver Island.