Go through Hieronymus' portal and examine what's on the other side.
Verified marker on the map.
{"map":{"height":4096,"key":"map.w3.map.kaer_morhen.cbdc88e39dc2","previewURL":"/media/the-witcher-3-wild-hunt-remastered/af1bd14bfec5f7b18832c8aefe5804006e4a228d6fa2cb9f07d33a05be25244b.png","tiles":[],"title":"Kaer Morhen","width":4096},"markers":[{"categoryKey":"quest_objective","categoryLabel":"Objectives","defaultVisible":true,"detailURL":"/en/games/the-witcher-3-wild-hunt-remastered/maps/w3-map-kaer-morhen/","details":[],"key":"marker.w3.marker.kaer_morhen.107b720b-8be3-4ed0-957b-02bf9d22a4f2.dd51e17de7fc","priority":70,"purpose":"activity","related":[{"title":"Scavenger Hunt: Wolf School Gear","url":"/en/games/the-witcher-3-wild-hunt-remastered/quests/ecda507b-a54f-4902-a9ca-d7851cf56be2/"},{"title":"Kaer Morhen","url":"/en/games/the-witcher-3-wild-hunt-remastered/maps/w3-map-kaer-morhen/"}],"title":"Go through Hieronymus' portal and examine what's on the other side.","x":2001.812375,"y":2104.649328125}],"ui":{"all":"All","catCamp":"ARK Camp","catCave":"Cave Entrance","catDiscovery":"Aniimo Discovery","catEliteChallenge":"Elite Pathfinder Challenge","catFastTravel":"Bloom · Fast travel","catNPCChallenge":"Pathfinder Challenge","catPortal":"Teleportation facility","catSurvey":"Ecological survey target","catTracking":"Quest tracking point","catTree":"Leyline Tree","categories":"Location types","close":"Close details","cluster":"{count} locations. Zoom in.","clusterSame":"{count} × {type}","clusterTypes":"{count} places · {types}","details":"Location details","distribution":"Creatures in this area","error":"The map is unavailable. Please reload the page.","filters":"Search and filters","fit":"Show full map","fitResults":"Show results","groupActivity":"Quests and events","groupChallenge":"Bestiary","groupCollect":"Collectibles","groupEncounter":"Characters","groupOther":"Other places","groupTravel":"Other locations","imageError":"Some map images could not load. Please reload the page.","instructions":"Drag to move. Scroll or pinch to zoom. With the map focused, use arrow keys to move, + / − to zoom, Home to reset, and Escape to close details.","layer":"Map layer","levelRange":"Lv. {min}–{max}","levelTier":"Institute Title","levelValue":"Lv. {level}","loading":"Loading map…","mapLabel":"Interactive map","noMarkers":"No location information is available. Try switching languages.","noResults":"No locations match these filters.","none":"None","noteActivity":"This location is related to a quest or event. Its availability depends on your in-game progress and event schedule.","noteEncounter":"This is a creature encounter location. Check in-game for current appearances.","notePortal":"Teleportation facility. Check the in-game requirements before use.","otherCategory":"Other locations","overlapping":"Overlapping locations","presetActivity":"Quests and events","presetAll":"All places","presetChallenge":"Bestiary","presetCollect":"Chests and collectibles","presetCustom":"Custom","presetEncounter":"Characters","presetLabel":"Browse by purpose","presetRecommended":"All places","presetTravel":"Other locations","recommendedHint":"Search all places, regardless of the current category filters.","related":"Related content","resetFilters":"All","resultCount":"{count} of {total} locations","resultsHeading":"Locations","searchHint":"Search all places, regardless of the current category filters.","searchLabel":"Find a location","searchPlaceholder":"Search names and places","selectMarker":"Select {name}","selected":"Selected: {name}","showMore":"Show more","variant":"Map variant","viewDetails":"View full details","zoomIn":"Zoom in","zoomLevel":"{percent}%","zoomOut":"Zoom out"}}
Game homeThe Witcher 3: Wild Hunt RemasteredAll games