You've come to the correct spot if you're looking for the Zelda TOTK Thundra Plateau Secret Cave puzzle solution. To be honest, this one makes me scratch my brain. Make sure the shadow from one pillar reaches the one on the other side. That is both very ambiguous and crystal plain. The Thundra Plateau Secret Cave problem in Zelda Tears of the Kingdom requires some ingenuity to complete. This is the intended method of operation.

Puzzle Solution for Zelda TOTK Thundra Plateau Secret Cave

Zelda's Kingdom Tears Solution to the Thundra Plateau Secret Cave Puzzle

Making the shadow of the southern pillar reach the northern pillar in the circle is the key to unlocking the Thundra Plateau Secret Cave puzzle in Zelda Tears of the Kingdom, often known as TOTK. As you can clearly see, the shadow of the southern pillar, which is located at coordinates -2264, 0878, 0110, is much too short to reach across. That means you need to chop down two of the trees that resemble mushrooms and join their trunks to form a pillar of your own. It must be four logs long in order for it to function. You might choose to attach a Zonai stake at the bottom in the next step. Lean Ultrahand lengthwise onto the southern pillar now.

Reaching the summit of the southern pillar is the next step towards solving the Thundra Plateau Secret Cave puzzle in Zelda TOTK or Tears of the Kingdom. Select the Ultrahand-created object, insert it stake-side down into the centre of the pillar. Fall on the ground, build a fire and take it easy till midday. After that, all that needs to be done is wait for the shadow to align with the northern pillar. This will cause the central stone slab to open, giving you entry to the hidden cave. You will need to stand on top of the southern pillar and hold your pillar high with Ultrahand if you did not already attach a stake. That is the only thing involved.