Mount Bro-suvius

Mount Bro-suvius is supposedly California's Mount San Antonio, though it is located on an island. The entire mountain, and other rocky formations on the island, are in the shape of fists.

History
Bros must travel to Mount Bro-suvius every 2,000 years to prevent the end of the world from the threat of the Bro-Pocalypse. This is done by solving various puzzles, navigating an extreme sports obstacle course, and reaching the Mount's summit. From there the bros must reciprocate an intergalactic fist bump sent by the bro gods, or else it will destroy the world.

Trivia

 * The name Bro-suvius is likely derived from Mount Vesuvius in Italy.