  We investigate how the complexity=anything observables proposed by
[arXiv:2111.02429, arXiv:2210.09647] can be used to investigate the interior
geometry of AdS black holes. In particular, we illustrate how the flexibility
of the complexity=anything approach allows us to systematically probe the
geometric properties of black hole singularities. We contrast our results for
the AdS Schwarzschild and AdS Reissner-Nordstr\"om geometries, i.e., for
uncharged and charged black holes, respectively. In the latter case, the
holographic complexity observables can only probe the interior up to the inner
horizon.
