After discovering that Cadence is not who she appears to be, Twilight is sent to another world entirely by the disguised Changeling Queen to avoid her plan being disrupted.
When Twilight lands, she discovers that not only have Spike, Owlowiscious and Peewee followed her, but that they've arrived in a world where the main sentient species is human.
There's still a place where they teach magic, though.
Crossover with Harry Potter. Twilight will be effectively taking the role of Hermione.

I've marked this story as cancelled to reflect the unlikelihood of it continuing. If I do come back to it I'll revert that.

After an argument with Luna, Celestia realizes that she is the only creature in Equestria who cannot sleep in. She enlists Twilight to help, and the two of them come up with a spell that will allow her to spend the night on a different world. Unfortunately, all their research failed to reveal that the world they sought was populated. Now, the Princess must decide whether to continue with contact, or destroy the only non-Equestrian witness to their existence.

Cover art is called "Sleeping Celestia" by Briskby

Quality time is pretty rare when you've got a country to run.

Edited by KidKolumbo.

This story is a sequel to The Best of All Possible Worlds

In school, everypony learns about the official history of Equestria, the acts of heroes and villains that made the world what it is today. But at home, everypony learns another, secret history, about how their family and theirs alone is at the center of Equestria's history, and how without them, the world will fall apart. This Hearth's Warming Eve, Twilight Sparkle and their friends will share their secret histories, and in this way discover that the bonds between them reach back far earlier than Rainbow Dash's first Sonic Rainboom.

This is a follow-up to my earlier story, "The Best of All Possible Worlds". That story was set centuries in the past, while this story is present day. If you're wondering where the humans came from, see another side story that is otherwise unrelated to this, "Parade Coverage". Despite that, I expect that this story stands alone. The story's set in an alternate-universe Season Three that branched off early in Season Two.

Every night, in a little stable just outside of town, an old mare lays down to sleep. And every night she has the same dream of rainbows and open sky...

This story is a sequel to The Best of All Possible Worlds

For generations, humanity has dreamed of discovering intelligent life out in the stars. To say that ending that search in downtown Pasadena was a surprise would be an understatement.

Princess Luna had herself a simple mission: Track Twilight Sparkle and her friends through a malfunctioning portal to Earth, and get them out without being noticed. Luna had no desire to establish permanent relations, or even to stay and talk. After all, both princesses were convinced from previous experience that humans were nothing but trouble.

It appears that both parties have much to learn about each other.

Present-day follow-up to "The Best of All Possible Worlds". "Alternate Universe" tag is because it pretty quickly diverges from Season Two continuity.

Sequel to The Return of Princess Nightmare Moon! After having made a full medical recovery Princess Nightmare Moon tries her hoof at wooing one of her subjects, Nurse Bandaid. Meanwhile, Chrysalis returns to feed on Celestia, still vying for the position of godhood. (Coverart by Mewaponny!)

Celestia decides that Big Mac's barn is an excellent place to sneak off to, to take naps on her days off.
Big Mac decides that Celestia is a welcome guest.
Neither Princess nor farmer ever speak to one another, but the silence sings between them.
(Cover art by GrapeParfait!)

Dearest Billy,

It is with a heavy hand that I must relay: He is dead, and passed away among his bees only some hours ago. I, too, am not long of this earth, thus it falls to you to publish my final wish. The attached parcel is my tin box--you have ferried it hither and thither before--and it is where notes from all our adventures, spanning two centuries, as many wars and three monarchs had been safely kept. The remaining bundles within, however, we agreed some time ago to never publish, lest our reputations be shredded. However, with his passing heavy on my mind, I cannot forget such cases, so singular and impressive that they prove, without a doubt, that Sherlock Holmes was the greatest detective London, Britannia, and Worlds beyond our farthest imaginations could ever have known.These cases will confuse you--perhaps even tarnish your memories of us--but mark my words: they are as true and real as the paper upon which you read this letter.

Most Faithfully,
Dr John. H. Watson MD

Imprisoned in the tunnels beneath Canterlot, she withers away in hunger and despair. In the castle above, curiosity leads him to a door that he is forbidden to open. When they finally meet, it is just the opportunity she has waited for. Mislead by a child's trusting innocence, Spike unknowingly stumbles into the clutches of Equestria's greatest foe. And once you embrace the darkness, the darkness never lets you go...

Cover image by ss2sonic