If the positions of the inert automata here don't worry you, you're not sufficiently paranoid to avoid death by sudden Dwemer Sphere.

Don't be afraid of the water here- all it's hiding are some potions.

It's not exactly a full circle, but it's a return to the Nchuand-Zel hub location, which puts you as close to the surface as you're ever getting until you're done in here, so you may as well use the opportunity.

...they kind of suck.  Fortunately, explosions.  Torgue would be so proud.

There's a bit of a clusterfrag waiting for you up here, but appropriate strategy can cut the danger you're in of getting overloaded with enemies.

Pay attention to the layout of this first part of Nchuand-Zel proper, as it's where you're going to be passing through as you check the outlying areas.

As it turns out, there was more down here than just giant deadly hungry spiders.

PROTIP: Check the webs.

Then you're going to absolutely love -this- dungeon.

Seriously, Dwarven Centurion are deserving of a 'Boss' title and everything that goes with it.