When you first arrive at the Upland Zorana Skyview Tower you will find that the main entrance is covered in sludge and you have no way to get inside. There is nothing to suggest that you can get in through the roof like you could with the Eldin Canyon Skyview Tower. So how are you going to get inside this tower?
As you have been climbing the mountain to get to this tower, you have likely spotted a lot of the sludge around the area and an abundance of these new splash fruit trees. Hopefully, you have picked up some of these as they are needed to get inside this tower.
As you can see from the video guide above, you will need to attach a splash fruit to the arrow of your bow. You can do this by holding RZ down and keep it held down. You then need to press Up on the D-Pad which will reveal a large list of items that you can attach to your current arrow. Go through this list until you find the splash fruit. Shoot this at the sludge pile in front of the door and it will cause the sludge to dissolve.
Keep this mechanic in mind as you are exploring around the land in the vicinity of the Zora domain. There are lots of puzzles and boss battles that require you to make use of the splash fruit to clear the sludge.
Now that the sludge is out of the way of the door of the Upland Zorana Skyview tower, you can head inside and interact with the terminal before getting shot up the survey the land.