  The doorways problem considers adjacent parallel hallways of unit width each
with a single doorway (aligned with integer lattice points) of unit width. It
then asks, what are the properties of lines that pass through each doorway?
Configurations of doorways closely correspond to Sturmian words, and so
properties of these configurations may be lifted to properties of Sturmian
words. This paper classifies the slopes of lines of sight, lines that pass
through each doorway, for both the case of a finite number of parallel hallways
and an infinite number and their consequences for Sturmian words. We then
produce a metric on configurations with an infinite number of hallways that
preserves the property of admitting a line of sight under limits. Pulling back
this metric to $\mathbb R$, we produce the Baire metric under which the
irrational numbers form a complete metric space. Pulling back this metric to
the set of all Sturmian sequences, we show that the set of all Sturmian
sequences is complete with this metric (unlike with the standard metric).
