Beyond Skyrim - Bruma screenshot of the city itself

As you can guess from the name of the mod alone, Beyond Skyrim - Bruma allows you to travel beyond the borders of Skyrim in order to visit Bruma, the northernmost region of Cyrodiil. What this means in gameplay terms is that you can explore a region larger in scope than the Dragonborn DLC, experience a variety of new quests and storylines, acquire new types of weapon and armor, as well as visit the fully-recreated city of Bruma.

If you're wondering what all of this might look like in-game, wonder no more as the modders have recently posted a trailer showcasing just that. Have a look, you might just be impressed with how much work went into this mod:

You can download the mod, or just learn a little bit more about Bruma, by heading over to Nexus Mods. Just keep in mind that you will need all three of Skyrim's DLCs in order for the mod to work, or the Legendary Edition that comes with them already bundled. 

As for the future, the Beyond Skyrim team is aiming to expand the scope of their mod and cover all of the other provinces of Tamriel, places such as High Rock, the entirety of Cyrodiil, Hammerfell, and even Morrowind. Given how much work went into creating just one part of Cyrodiil I wouldn't get my hopes up on seeing the other regions any time soon, but the rest of Cyrodiil is definitely a realistic milestone the team can accomplish if they continue expanding the world at this pace. Speculation aside, allow me to leave you with a couple of images from Bruma:

Beyond Skyrim screenshot of a riven in Bruma

Beyond Skyrim - Bruma screenshot of a snowy windmill

Beyond Skyrim - Bruma screenshot of a church