Maintenance for the week of November 4:
• [COMPLETE] ESO Store and Account System for maintenance – November 6, 9:00AM EST (14:00 UTC) - 6:00PM EST (23:00 UTC)
An Adventure Zone designed for groups of four Veteran Rank characters to explore, located between Cyrodiil and Skyrim. A new quest available in Mournhold, Wayrest, and Elden Root will lead you to the zone."
I haven't been in the game since the patch, but I have a sneaking suspicion they might have made it a tad bit too hard to figure this out for those that don't read patch notes
If you're in vet ranks and in DC, there is a guy with a wagon in Wayrest. He mentions something about the stars disappearing from the sky of something. He'll take you to Craglorn. It should be the same in the other cities from the patch notes.