There are several extremely powerful magical things scattered across Tamriel with no clear creator. The Skyforge, the Doomstones, the Standing Stones, and those stones on Solstheim, to name a few. These things likely pre-date the Mer. What created them? Ehlnofex? The Divines? The aborigines of Tamriel?

The ruins of Aldmeris?

I would assume the skyforge was created by the first nords in Skyrim. As for the doom-stones in Cyrodil, I would imagine that they might be related to the varliance of the ayleids in some way. Stars are required to shine on them or they don't work. The standing stones obviously have connections with the stars. I think that the culture predating the ayleids and falmer must have built them. Some of the runestones are named after Reman, so those were either during his time or in the early interregnum. The sidri-ashak runestones clearly come from an akaviri name, so interregnum era. Your guess is as good as mine for the hestra stones.

The Songs of the Return have the Nords finding the Skyforge, which the Falmer prisoners of war said was older than them.

Also the Sidri-Ashak runestones were named after an Akaviri Potenate according to ingame books, though I think there was only two.

And the Nords started in Skyrim.

The Falmer claimed it was almost as old as Nirn itself, and it was some remnant of the god's attempt to create a paradise in Mundus before the unfortunate Ehlnofex Wars and Convention and stuff.

The Falmer claimed? I thought that the Falmer just stayed far, far away from it on the account of it scared the piss out of em.

Remains from an older Kalpa?

Sounds like inspiration was involved then, if you catch my meaning.

Why would the Dreugh make a huge statue of a birdy on their forge? I think they'd make a Cuttlefish or Coconut Crab.

What's more mythical and alluring to a creature of the sea then a creature of the sky?

*sigh* Kyne, the ada associated with inspiration would a big factor in designing a paradise. It isn't called the Skyforge for nothing.

For a moment I misinterpreted that it was called the Skyforge because it was meant to literally forge the sky.

Now I think that the Skyforge was supposed to be used by the Divines to create hyperpowerful stuff, like the Hammer of Stendarr and the Staff of Magnus. Probably able to forge towers, mountains, life and other stuff too, because a god with the greatest forge possible can probably smtih anything.

Wish there was more information on what connection, if any, there is between the Skyforge and http://uesp.net/wiki/Skyrim:Notes_On_The_Lunar_Forge. They both create unique weapons, but no one can get the Lunar Forge to actually make anything unique.

The Nords are descended from the Nedes from Atmora, their not originally from Skyrim.

Just like how the Aldmer are from Old Ehlnofey. Because Old Ehlnofey is a real place. Right? Right?

He's talking about how all the races are originally from Tamriel. Most races remember this history in some sense. The Nord creation myth, for example, has the Nords coming down to Nirn for the first time from the Throat of the World.

Fragment of Aldmeris?

I really want the Skyforge to be the nest of a Thunderbird-esque avatar of Kyne.

It turned into a statue like the Avatar of Aka in the Temple of the One.

Et'Ada/Elhnofey during nonlinear time. That is to say that they've always existed.

The Skyforge has a giant eagle on it, leading me to believe it was built/blessed by Kyne (or her Atmoran equivalent).