The Dimensional Observatory is a location where a Vortex Master can learn other worlds' difference with the Prime World.

Dr. Tex just gained access to the famous Dimensional Observatory, where he learns of many other Equestrias, and how they differentiate from Equestria Prime.

This is a series where Tex observes many different possibilities that could happen in the show, had the the characters chosen the other choice. It MIGHT bring attention to some other stories though.