Where is the big challenge for The Witcher 3 hotel owner?

Shack. The Innkeeper's Challenge in The Witcher 3 is located in a shack in the wasteland near Benjamin's Golden Arch in Novigrad. This mission involves playing cards with a woman named Sasha and is titled "Hotel Owner Challenge." In the game world, you can use the world map to find the location of the mission, and the marker for the mission will usually be displayed on the map. When approaching the mission location, the mission mark will turn into a yellow exclamation point, indicating that the mission has been discovered. After entering the mission area, you will see a remote cabin, which is the location of the mission.