This page explains how to find the Zalta Wa shrine and solve the "Two Orbs to Guide You" puzzle.
How to Reach the Shrine
This shrine is on the road that goes east away from Ridgeland Tower.
How to Solve the Shrine
There is an orb on a short pillar near a wall. Use an arrow to shoot the orb down into the target hole nearby. This opens a gate where there is another orb. Take the orb and stand on the switch near the gate, then throw the orb through the gate to land in the target hole beyond.
Stand on the square next to the crystal switch, then hit the switch when the moving wall is coming toward you. Use the paraglider to float into the moving wall. Go up the ramp inside.
There is a treasure chest on top of the structure that you threw the second orb into. Float to it from a ramp and open it to get a Knight's Bow.
Then use the crystal switch platform again to go into the moving wall, and go up the ramps to reach Zalta Wa.