What Solas wishes to show her is what is left of the People in the world. He has been to some ruins, visited the Temple with Adalia and her companions, had seen what had been lost over time and ignorance. It’s part of what hurts him so deeply, to see the People he had loved so dearly reduced to ruin and neglect, abandoned due to the work of those he had no reason to hope to exist.

Watching her stare around at his creation is enough for him. He wanted to give her comfort, true, but he also wanted her to see what the Fade could be in the hands of someone who understood it, someone who knows it as intimately as he does. It’s easy to move up beside her, to stand at her side and follow her gaze, fond and pleased. He’s proud to have inspired this in her.

“This is what remains of the People. In part, at least.” There’s more, beyond the mirrors, but he has yet to learn the codes. “This is what the Fade holds - memories of places throughout history. I’m glad to share it with you.”