Chaas Qeta Shrine
The shrine can be reached through many means, though the easiest is to paraglide from a vantage point. The island is close enough not to warrant using a raft, but that's an option too.
A Major Test of Strength
The Chaas Queta Shrine is one of the many Major Test of Strength shrines. Defeat a Guardian Scout IV, who wields a Guardian Sword++, Ancient Battle Axe++, and a Guardian Spear++. Once defeated, open the treasure chest to get the Climbing Gear, one of the pieces of the Climbing Set. Then run to the altar and speak with Chaas Qeta to get a Spirit Orb.