How do you get to skuldafn?

To reach Skuldafn in "The Elder Scrolls V: Skyrim," you must first complete the quest "The World-Eater's Eyrie," which is part of the main storyline. After defeating the dragon at the Throat of the World, you can access Skuldafn by using a portal created by Paarthurnax. The location is primarily accessible during the quest, and you'll need to navigate through the associated challenges and enemies. Once inside, you can explore and progress through the quest objectives.