The Great Plateau Foothill Cave is in the north wall of the Great Plateau, and can be found south of the Hyrule Field Skyview Tower.
Cave Location
Great Plateau Foothill Cave is at -0833, -1486, 0027 and can be found by going south from the Hyrule Field Skyview Tower.
Cave Features
The entrance of the cave is blocked by boulders. Use a heavy weapon or bomb flowers to get rid of these boulders. Beyond them, you encounter two Horriblins.
Up ahead, there is a wall of blue boulders. Break these to find the cave's Bubbulfrog.
At the far end of the cave, there is a wall of black boulders. Break through them to find Kyokugon Shrine.