The unwarded facilities are full of horrors again.

Of course they are. What does the primary exit look like?

The primary exit is sealed shut. The outside takes the shape of an ocean full of eyes and organs.

He misses when the world was more creative. It's been at least a dozen cycles of eyes and flesh and water.

It's time to collect some specimens. Shapechange. He becomes a horrible demon-spider with the ability to shift between dimensions (O-364) and leaves the extradimensional garden.

The ocean is alive, for it is not an ocean at all. Layers upon layers of indescribable substance, varying in size and shape dramatically, fill the space beyond the primary exit.

He shapeshifts the form of an incorporeal spirit (U-18) and many of his senses fizzle away. Undead forms are always strange to take. Without a body, the water and eyes and flesh don't impede him.

The ocean of the current layer goes on for miles. Strange and horrible things swim across the depths.

He has a photographic memory and is perfectly capable of memorizing their forms to try later. Absolute direction doesn't exist here, but he can move relative to the facilities. He travels upward for a long while.

The layers shift a few times. Now he's in a sky crackling with lightning of impossible colors.

He hasn't seen a layer like this in some time. Wildlife?

The typical eldritch horror nightmare selection, of course. 

Wonderful. He will memorize their forms, which cannot drive him insane because he's currently immune to insanity.

Eventually, deep inside a storm of screams...

A strange bipedal entity clad in an obsidian shell floats motionless.

He has since shifted into O-16541 for their nearly universal energy immunity. Incorporeality is less helpful in a layer full of air.

What is that? The humanoid body plan is incredibly rare. It looks somewhat like a golem? He flies over to it.

The strange entity remains motionless.

In addition to their impressive defenses, the form of O-16541 possesses telepathy with a one-hundred foot range.

Hello.

There is no response.

Hmm.

Can you hear me?

There is no response.

If he floats up right next to it...

Nothing.

Huh. Will the entity let him lay a hand on it?

The entity does not move. Its shell feels like smooth ceramic.

It's probably a golem of some kind. To survive out here, it must either have self-repair capabilities or be incredibly durable. He will memorize its form and move on.