  Motivated by principles from the Swampland program, which characterize
requirements for a consistent UV completion of quantum gravity, combined with
observational data, we are led to a unique corner of the quantum gravity
landscape. In particular, using the Distance/Duality conjecture and the
smallness of dark energy, we predict the existence of a light tower of states
and a unique extra mesoscopic dimension of length $l\sim
\Lambda^{-\frac{1}{4}}\sim 10^{-6}\, m$, with extra massless fermions
propagating on it. This automatically leads to a candidate for a tower of
sterile neutrinos, and an associated active neutrino mass scale $m_{\nu}\sim
\langle H\rangle^2\, \Lambda^{-\frac{1}{12}}M_{pl}^{-\frac{2}{3}}$. Moreover,
assuming the mechanism for stabilization of this dark dimension leads to
similar masses for active and sterile neutrinos we are led to the prediction of
a Higgs vev $\langle H\rangle \sim \Lambda^{\frac{1}{6}}M_{pl}^{\frac{1}{3}}$.
Another prediction of the scenario is a species scale ${\hat M} \sim \Lambda^
{\frac{1}{12}}M_{pl}^{\frac{2}{3}}\sim 10^{9}-10^{10} GeV$, corresponding to
the higher-dimensional Planck scale. This energy scale may be related to the
resolution of the instability of the Higgs effective potential present at a
scale of $\sim 10^{11}\, GeV$. We also speculate about the interplay between
this energy scale and the GZK limit on ultra-high energy cosmic rays.
