  The Kruskal-Szekeres coordinates construction for the Schwarzschild spacetime
could be viewed geometrically as a squeezing of the $t$-line associated with
the asymptotic observer into a single point, at the event horizon $r=2M$.
Starting from this point, we extend the Kruskal charting to spacetimes with two
horizons, in particular the Reissner-Nordstr\"om manifold, $\mathcal{M}_{RN}$.
We develop a new method for constructing Kruskal-like coordinates and find two
algebraically distinct classes charting $\mathcal{M}_{RN}$. We pedagogically
illustrate our method by constructing two compact, conformal, and global
coordinate systems labeled $\mathcal{GK_{I}}$ and $\mathcal{GK_{II}}$ for each
class respectively. In both coordinates, the metric differentiability can be
promoted to $C^\infty$. The conformal metric factor can be explicitly written
in terms of the original $t$ and $r$ coordinates for both charts.
