This story is a sequel to Antipodes

Several decades after the heroic actions of Jigsaw, Tiptoe, and Incendia restored the princesses, the world has begun the slow process of healing. Spectrum is a headstrong young stallion from Totemhoof who signs up with an excavation team in the hopes of experiencing a life changing adventure. What he finds will send him into a head-on collision with forces he can't begin to comprehend- and, perhaps, a chance to fulfill his destiny.

Sequel to Antipodes- though you don't need to have read it to enjoy this, I hope.

AKA An2podes

Was it a magical spell gone awry? An angry god laying waste upon a world that had forgotten him? A long and bloody war? An incurable disease?

Fluttershy couldn't remember what it was that had turned the world to this. All she knew was that she had to survive.

The Shaper is a smith of unparalleled skill, her creations the most sought after in the fallen world. When a pony named Lyra comes to her with a unique commission she has to put all her skill to the test to craft a weapon of great power. For Lyra's goal is not an easy one, and it is not just any weapon that can kill a Dragon.

A story inspired by this and this image, as well as this challenge by CDRW (whose fic A Still More Glorious Dawn Awaits is quite good).

Set in the far future after Celestia and Luna mysteriously vanished and the sun and moon froze in the sky, Antipodes is the story of two ponies thrust out into the harsh new world on an adventure to uncover what happened to the world so long ago.

(I wrote this when I was 17. it's pretty rough in places, but i think the basic ideas i had here were pretty cool. it's got a good skeleton)

Spanish translation here: https://www.deviantart.com/spaniard-kiwi/art/Antipodas-1-3-953524835

Not so long ago, Equestria barely defeated two almost unstoppable creatures known as humans, which they called the Second and the First. Almost five years later, another one has shown up. The military takes up arms, the princesses are stricken with fear, and the Elements of Harmony assemble, ready for battle. But 'the Third' has no idea what's going on, and only wants to know how he came to be here, and how to get back home. Good questions indeed...But will he ever get his answers? Or will his predecessors' legacy catch up to him first?

“Side story/prequel to Human by DannyJ, but can be read on its own. Contains spoilers.”

In Equestria's far future, one thousand and five years after the return, a dysfunctional group of argumentative ponies must quest to defeat the most dangerous enemy of Equestria to ever live; the malevolent Lord Second, one of the only known members of the race of elder gods known as the humans, and the ancient cult who worships him, the Brotherhood of Man.

An over-the-top surrealist comedy, with slight serious elements. Expect a steady decline into insanity.

Cancelled, due to reasons of severe cranial trauma

Now with audio reading and prequel story, Shades of Grey, by Draven Eclipse.