The Star Maps in general can be pretty creepy, especially if you look into the lore not extrapolated upon in the game.

Might explain why it's so dangerous down here. I wonder if the Star Map has had an effect on the evolution of the creatures here in the Shadowlands. I always knew there was something funny down here.

The captive Jedi in Malak's command room - dead, but not released to the Force, and serving as battery cells for Malak whenever he needs a Force boost.

Not to mention the fact that even a scratch from one of them will turn someone into a rakghoul.

Not to mention that you can see the massive one hovering by the bridge, ready to eat you if you try to cross over to the Star Map before you've done something to get rid of it, either by destroying the kolto filters or poisoning the water. And there are more beyond the edges of the map. The outside is actually worse because you can't see them until they're practically right on top of you and your targeting system picks them up.

Full of insane Selkath that try to rip you to pieces inside, surrounded by firaxen sharks that try to rip you apart outside. If you sit down and think of it for a while, Bastila turning to the Dark Side falls under this: it is stated that in order for that to happen, she got tortured and had her mind broken.And one of them can kill your entire party if you're not very careful. In one of the tombs, there are two more which you have to fight at the same time. Think a rancor the size of a truck, but covered in spikes and resistant to Force powers. Nearby, you can explore a cave filled with giant flying reptile things which are more annoying than scary, but also in the cave is a terentatek. This is added by the fact that the Sith at the academy are casually cruel, to the point that they'll torture applicants to the academy until they collapse, leave them for dead, and then not even let them into the academy. If you get them right? He'll torture someone else instead. In another, you're captured by a completely insane psycho who asks you a series of questions, and if you get them wrong he'll torture you with lightning. In one, you have to have a conversation with the Force-ghost of a long-dead Sith Lord.

The player is required to explore the tombs of dead ancient Sith, which even the powerful Sith at the academy are afraid to enter.

Korriban: It's a small world with a Sith academy.

The first time you see Malak without his jaw prosthesis.

Kotor interrogation sith prisoner