  This paper contains some results about the topology of
$\mathcal{M}_{0,n+1}/\Sigma_n$ and $\overline{\mathcal{M}}_{0,n+1}/\Sigma_n$,
where $\mathcal{M}_{0,n+1}$ is the moduli space of genus zero Riemann surfaces
with marked points and $\overline{\mathcal{M}}_{0,n+1}$ is its Deligne-Mumford
compactification. We show that $\mathcal{M}_{0,n+1}/\Sigma_n$ and
$\overline{\mathcal{M}}_{0,n+1}/\Sigma_n$ are not topological manifolds for
$n\geq 4$, and they are simply connected for any $n\in\mathbb{N}$. We also
present some homology computations: for example we show that the homology of
$\mathcal{M}_{0,n+1}/\Sigma_n$ is all torsion and that
$\mathcal{M}_{0,p+1}/\Sigma_p$ has no $p$ torsion, where $p$ is a prime. Lastly
we compute $H_*(\mathcal{M}_{0,n+1}/\Sigma_n;\mathbb{Z})$ for small values of
$n$, proving that $\mathcal{M}_{0,n+1}/\Sigma_n$ is contractible for $n\leq 5$
while $\mathcal{M}_{0,7}/\Sigma_6$ is not.
