Yes, you can enter the glittering caves. The entry is at its lore accurate place.

No there is not a way to get to it. It is just lore. It may be in it's "lore accurate" spot but nothing in the game tells you how to get to it, and the only clue I could find was when I accidentally got under the mesh and saw an unreachable door. So there's an actual answer instead of an "Erm ackshually" from a dev who's head is too far up his own ass to realize he isn't funny

wtf

I recently played as a dwarf. I learned about the Glittering Caves from "rumors" among the DWARVES (access to Caves was unavailable before I did). It seems that this is the right way to discover this location - to question the dwarves.

I found the door and enter, but the caves were empty, like a regular dungeon, without any beauty (though I seem to remember it being really beautiful in previous versions).
And then leaving it I exited under a large flag on the wall in Hornburg's main hall O_O.

UPD And about another legendary location, Amon Hen.
I was unpleasantly surprised to find a staircase with giant steps on a hill in a ruined tower, which could not be climbed to the Throne of Vision.

UPD And more frustrations.
There are no spiders in Mirkwood and there is no spider nest now.
I've never been attacked by wild animals in all the campaigns for different characters :((.

https://images.steamusercontent.com/ugc/13294309362286817449/4915C68F2C99153D260784574839BA8EDE6C87BA/?imw=5000&imh=5000&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false

Thanks for the new post, I must've missed your previous one.

I can assure you that there's stuff to find or to do in all secret locations.

I agrre that the exit point for the Glittering Caves is weird. I'll move it to a more sensible place in the next update. No, you don't get access via rumors. The entry is exactly where it's supposed to be.
(Edit: Looking at the code, if you got the menu option to enter the caves, that was either via cheat mode or because you have an old savegame that stores the caves as "already discovered".)

Not sure what your screenshot is supposed to show. Did you somehow glitch out of bounds? If yes, it would be helpful to describe where that happened.
Incase you wonder about that door: No it's not supposed to be reachable. It's the door that previously lead to the castle, which is no longer accessible.

Okay, I've remember where the entrance to the Glittering Caves is :)))
Although, in my opinion, the entrance to the Paths of the Dead would be more appropriate here.
https://drive.google.com/file/d/18gMOuuLM3IdLovkHXdckyQzJq6bBYLrE/view?usp=sharing, https://drive.google.com/file/d/1Ytg4qSeZbpLHWwogJyJaIB42_bsIX_LK/view?usp=sharing, https://drive.google.com/file/d/1hPmtIxfJtcB-MfbCUME39eUMaZKPA969/view?usp=sharing

@InVain
Regarding the texture failure, here are the results of a small investigation:

https://drive.google.com/drive/folders/1Tjji7Yq1xwcDSK_jqS5jh33LWfwf_Uku?usp=drive_link

The easiest way is to turn your back to the weaponsmith and walk straight into the rock. This permeable plane also seems to continue to the left of the citadel towards the river inside the fortress.
In my opinion, all permeable surfaces are covered with the same texture, as it appears in low resolution - it's clear in the images.
You can exit from under the citadel through the passable rock under the main gate, into the outer river. But you can't penetrate the rock from the outside to get back in.
Also, the ramp's edge from the main gate is transparent to the horse, which is bad: you can fall from a great height and injure the horse.

Photos 62 and 63 are not related to walkable texture issues. It's just that this location looks like a suitable cave entrance if a house like this, or another structure with a gate, is built against the mountain. This is in case the entrance isn't located somewhere in the citadel. Just my ideas for alternative Cave entrances, sorry :)

Hello, thanks for the report. The Hornburg model is missing a few collision meshes for performance reasons, as I didn't expect players to willingly run into rocks searching for secret entries. I'll see if I can block off those passages in a future update.

As I said, the entry is exactly where it's supposed to be, in its lore-accurate place.
The Paths of the Dead are not in the mod, but their entry is not in Helm's Deep, but in Dunharg.