Hateno Village Research Lab is a synonym for scientific research, technological advancement, and ancient gear. But in Tears of the Kingdom, this area isn't accessible right away. Sure, walking up there is as easy as pinning that hill on the map. However, there will be no upgrades until you get a scientist inside the lab. Robbie, the eccentric engineer from Lookout Landing, will gladly join this cause, but first, he wants to help out his assistant Josha.
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Once requirements are met, speak with Robbie in Tears of the Kingdom. Get his hot-air balloon all fixed up using Autobuild. He'll rudely take off to the Hateno Ancient Lab without offering a ride. So, head to the Hateno Ancient Tech Lab to continue this quest.
At the TotK Hateno Ancient Tech Lab, Robbie will install the sensor feature to the Purah Pad. Whenever near a shrine, the sensor will light up more frequently. Surprisingly enough, there seems to be one nearby, and Robbie wants you to pinpoint its location.
Exit the Hateno Ancient Tech Lab and glide off the mountain. In the apple tree area below, there's a spot covered with breakable rubble. Use a Tears of the Kingdom weapon fused with a boulder to destroy the rubble and discover a secret cave: Retsam Forest Cave. Need a boulder to fuse a destructive weapon? Two boulders can be spotted at the cave's entrance left.
Once inside the cave, follow the sensor that leads to Mayahisik Shrine. Activate it and head back to the Hateno Ancient Tech Lab. Robbie is stoked that there was a shrine quite literally underneath the lab. After speaking with him, the quest will be over.
And that's it! Check out our other The Legend of Zelda: Tears of the Kingdom guides below to help with crafting, exploring, and tackling challenges across Hyrule.
Tears of the Kingdom Complete Guide | Every Ability & How To Unlock Them | How to Get The Paraglider | How to Get & Use The Travel Medallion | All Armor Locations & Where to Find Them | All Construct Materials & Where to Find Them | All Shrine Locations & Strategies | How to Get More Heart Containers