Zelda: Tears Of The Kingdom - Marari-In Shrine Guide

gamespot.com:

The Legend of Zelda: Tears of the Kingdom Marari-In Shrine is fairly well-hidden. That's because it's tucked away in a corner of the map that you probably won't visit unless you go off the beaten path. Here's our guide to help you find the Eventide Island Marari-In Shrine in Zelda: Tears of the Kingdom.

The Legend of Zelda: Tears of the Kingdom Marari-In Shrine can be found on Eventide Island, which is all the way at the southeastern tip of the world map. Basically, if you've been to Lurelin Village to help repair its buildings, there's a good chance that you've seen another landmass in the distance (i.e. past the «dagger» of the cove). You can go ahead and create a seafaring vehicle, such as a bunch of logs attached together, along with a Zonai Fan and a Steering Stick, to make your way there.

Upon arrival, you'll notice that Bokoblins and other monsters populate this area. Eliminate them as you see fit, then make your way to the northern portion of the main island.

There, you'll meet an NPC named Sesami. He'll inform you that there's a pirate ship patrolling the place, and that the vessel disappeared behind a cove.

Head to the coast near the opposite/smaller island this time. You should see the entrance to the Pirate Hideout behind the cove. There, you can take out more enemies as you proceed.

As for the Zelda: Tears of the Kingdom Marari-In Shrine, you'll spot it just opposite the prow of the ship. The problem is that there are spikes sticking out of the ledge. Thankfully, the ship itself has several wooden planks. Go ahead and attach these to form a makeshift bridge.

Upon crossing, tag and enter the Shrine. It's a Rauru's Blessing, and you'll get a Ruby from the chest. In any case, this is but one of many activities