  We examine the internal structure of the $\Lambda(1670)$ through an analysis
of lattice QCD simulations and experimental data within Hamiltonian effective
field theory. Two scenarios are presented. The first describes the
$\Lambda(1670)$ as a bare three-quark basis state, which mixes with the
$\pi\Sigma$, $\bar{K}N$, $\eta\Lambda$ and $K\Xi$ meson-baryon channels. In the
second scenario, the $\Lambda(1670)$ is dynamically generated from these
isospin-0 coupled channels. The $K^-p$ scattering data and the pole structures
of the $\Lambda(1405)$ and the $\Lambda(1670)$ can be simultaneously described
well in both scenarios. However, a comparison of the finite-volume spectra to
lattice QCD calculations reveals significant differences between these
scenarios, with a clear preference for the first case. Thus the lattice QCD
results play a crucial role in allowing us to distinguish between these two
scenarios for the internal structure of the $\Lambda(1670)$.
