Apple Star gazed out into the concrete jungle, jagged fingers of alien stone and steel reaching for the overcast sky. The ruined buildings were alien in both construction and shape; the materials were made in ways lost as soon as the humans left, and the shapes were all wrong; too large, too tall, no connection to nature. She'd been told by her elders that the buildings had looked majestic and stately when the ponies had returned, but that had been in her grand-grandmama's time. Now they were just ruins, time and Equestria not liking the intruders, all shattered and listless, green overgrowth eating away day after day, year after year.
Apple often wondered where the humans had gone and why; she was glad that ponies had then been able to come back, but she wanted to see these beings that had changed the very course of her world.
"Hey Apple, whatcha wondering about?"
Apple startled and turned towards the voice, ready to run. It was only when her friend Mossy floated down with her small wings working overtime to keep her balanced that she relaxed. "Just, ya know, thinking about the humans, where they went and why."
Mossy landed and and looked around, looking confused. "My mum says good riddance that they're gone, cos it meant we could come back".
Apple sighed, "Yeah, I guess so".
Mossy perked up, "Wanna go see if park has anything good to eat this time?"
Apple thought about it a little, then her tummy rumbled and she smiled. "Yup, race you there!"