Funnily enough, it actually had not occurred to Link that there would be stairs to use. Buildings like this - so tall, and yet so thin and narrow - just didn't exist in Hyrule. So he had no experiencing navigating the inside of them.

Easier, in Link's mind, to just climb up the outside.

Eventually, though, Link makes his way back to the ground. Then he turns around...and finds that there's a little girl staring at him.

"...Hi," he says.