The Unsightly Catacombs is found in Altus Plateau. Players can reach this location by first traveling to the Perfumer's Ruins by heading west from the Abandoned Coffin site of grace. The entrance to the catacombs is found below the ruins, with the door attached to the cliff face in the southwest.

The Unsightly Catacombs is a small dungeon found beneath the Perfumer's Ruins in Altus Plateau. The entrance is located in the southwest of the cliff face below the ruins and is barred by an Imp Statue Seal, requiring 2 Stonesword Key to gain entry. These Catacombs are a good source of Grave Glovewort upgrade materials for strengthening your Spirit Ashes (provided you have progressed Roderika's questline).

A few steps from the entrance, you will find a Site of Grace to rest and modify your equipment. Be warned, this is the only Site of Grace for this dungeon and there is a fairly difficult boss fight at the end of the catacombs, with plenty of agile Misbegotten enemies along the way that can easily catch you with their very wide, very quick swings. Small pockets and corridors are lit but it is recommended you equip a Torch for the darker zones.

Head down the steps ahead of the Site of Grace to enter the first set of corridors of the dungeon. There is a Misbegotten laying here that you can ambush with ranged attacks before it can act. Straight ahead is a Summoning Pool just before the turn, should you wish to summon for help. The next hall contains two of the wingless, but larger Misbegotten carrying halberds and patrolling the left and right corridors. If you wait, you can sneak up behind them to perform a critical attack and get a decent amount of damage in. Do not be fooled by their large size and lumbering walk animation. These creatures are incredibly agile and like to perform wide swings and attacks with lots of travel. They can also very quickly roll towards you to close the distance. There is nothing special on this floor so you can head down the steps in the middle after either dispatching the Misbegotten or sneaking past them.

Down the next level, be careful of the Misbegotten hiding in the right corner. There is a Grave Violet near where it was sitting. Look for the path leading east. There is a Misbegotten and Winged Misbegotten at the end of this path. Go to where they were to pick up the Grave Glovewort (5) by the wall then look for the corridor heading south to find the stairs to the next level down. A Grave Glovewort (4) can be found in your path as well as a Winged Misbegotten at the end of the corridor. Note that this corridor leads to yet another lower level with a locked door at the end. That is your goal, but first look to the right of the last glovewort for a pit you can jump down to. If you are a ranged or magic user, you can safely target the misbegotten enemies from up here before jumping down. Otherwise, take them out carefully as you land below. There is a total of 4 Misbegotten in this pit that are lying down. When you get down, check the southern wall for a corpse containing the Winged Misbegotten Ashes so you can summon one of these agile warriors for yourself. A Ghost Glovewort (5) lies in the corner as well.

Look for the lit corridor and pick up the Grave Glovewort (4) along the way. At the bend is a set of steps leading up one level. There is a statue at the center here with a lever in front of it, used to unlock the door leading to the boss. Check the corridors around the statue for a Rune Arc and the Prattling Pate "Apologies" reusable item. If you look at the center of this level, you can jump down the middle to reach the pit connecting to the formerly locked door but before you do, look out for the Ogre now roaming the area. Consider using ranged attacks and spells to safely take it out from up here before jumping down.

When ready, proceed through the locked door and the fog gate behind it to challenge this dungeon's Boss Encounter: Perfumer Tricia. This fight is particularly difficult due to the fact that Tricia is accompanied by an extremely aggressive Misbegotten Warrior who has his own boss health bar. It is highly recommended that you bring along a strong and tanky Spirit Ash summon of at least +5 in order to distract the Misbegotten while you take Tricia out. Defeating the boss duo awards you with Perfumer Tricia Ashes.