Nokron, Eternal City is a whole city that is accessible in the underground region of the Elden Ring. It has some great bosses and rewards as well and great items to collect from smithing and Somber smithing stones.
There are two parts of Nokron, Eternal City, For the first part, you can access it directly even from the start of the game. You don’t have to do any specific quests or defeat bosses to unlock the first region of the underground Nokron, Eternal City.
For the second part of Nokron, You have to defeat Radahn in order to unlock the second part.
First part of Nokron, Eternal City
For the first part, you can access it without having to do any major quest or defeating a boss. In Limgrave, you have to go to the Siofara River well. You have to go a little bit east to the Siofara River well to go to Nokron, Eternal City.
You will reach a Mausoleum, you need to head inside there is an elevator there. You need to head down the elevator and you’ll reach the underground region of the Elden Ring. You can use Torrent to ride and explore the underground region. You have to go through a door from the elevator you took and it will take you to the open area, which is the first part of Nokron, Eternal City. You can access this first part of the Nokron whenever you want.
Second part of Nokron, Eternal City
The second part for the Nokron, Eternal City can be unlocked by defeating the boss Radahn. You have to go to the Redmane Castle talk to the knight there where they are preparing for the Radahn festival. You have to defeat Radahn on the battlefield. This will unlock the second part of the Nokron, Eternal City.
How to Access
You need to go to the Mistwood Outskirts, accessing the second part of Nokron, Eternal city is a tricky part so you have to be careful and follow the path as shown on the map. You have to come down south to the pinned location on the map from the Mistwood Outskirts then cross the Mistwood Ruins and get to the pin.
You will find a cliff and some floating stones, You have to get to the edge and you’ll see a pathway of floating rocks below you have to jump down on the floating rocks and make your way. You will finally reach a big open pathway under the ground. You need to go inside jump down to a building area under you. You will reach out from a building in the underground city of Nokron. You can now finally access the hidden city of Nokron.