Go upstairs after entering to get a fair overview of this locale. Once you gain control of Link, use the Beetle and look atop the entrance pillars; one has a Red Rupee atop it.
Goddess Cube 7¶
Go forward to the crest at the nearby altar. Ignore it for the moment and go around behind it to find Goddess Cube 7. Hit it with a Skyward Strike, then return to the platform in front of the crest. Hit this with a Skyward Strike. You’ll watch a scene, during which you’ll obtain the Ruby Tablet before automatically exiting to the Deep Woods.
One dungeon down, it seems. Upon exiting, go forward and you’ll converse briefly with a Kikwi. Afterwards, use the Bird Statue to save and return to the sky.