Dormant Factory (edit 1)

[Achebe]

Distantly you can just see
the building -- light sand hue -- almost
lost in brush and trees from view.

Blue spruce close partner with banyans 
on the front perimeter; live oaks reach
with sweeping boughs, converge 
on red mangroves that shelter 
the old roman reflecting pool
curiously full of clear water.

Amidst roots of mangrove 
is the only way in, as water channels
through the wall.

Marble floors, wet, turn to wide stairs down.
Deep it goes, down, 
down, into large dark halls
filled with cold air, subtle smell of mothball.

At the base dynamos sit dormant, surround
a lone metronome --
which thocks its rhythm endless 
and defiant.

Hi aschueler - although common, the theme of decay and defiance in its face is always accommodating of more poems.
The structure of your poem is decent - an intro, a virtual tour, and an image at the end to underscore the theme.

On the other hand, the following could be areas of improvement:

i) too much unnecessary detail that overwhelms the reader eg. 4 different types of trees / plants in S2.  I had to re-read it to figure out what was going where, only to see later on that it was completely unnecessary. 
ii) verb choice eg. I can't picture how the roots 'reach' and 'converge', how the water 'channels through the wall' (has it cut a channel in the earth alongside the wall? has it cut through the wall? is it just running down the wall? if so, where's the channel? I am disturbed by the ambiguity).
iii) adjectives, many and vague: 'large dark', 'subtle' smell, 'curiously' full, 
iv) occasional verbosity: 'on the front perimeter' instead of 'in front of'

good luck