  We consider the Pleba\'nski class of electrovacuum solutions to the Einstein
equations with a cosmological constant. These space-times, which are also known
as the Kerr-Newman-NUT-(anti-)de Sitter space-times, are characterized by a
mass $m$, a spin $a$, a parameter $\beta$ that comprises electric and magnetic
charge, a NUT parameter $\ell$ and a cosmological constant $\Lambda$. Based on
a detailed discussion of the photon regions in these space-times (i.e., of the
regions in which spherical lightlike geodesics exist), we derive an analytical
formula for the shadow of a Kerr-Newman-NUT-(anti-)de Sitter black hole, for an
observer at given Boyer-Lindquist coordinates $(r_O, \vartheta_O)$ in the
domain of outer communication. We visualize the photon regions and the shadows
for various values of the parameters.
