The Laniakea supercluster is a recently identified structure comprising our Local Group and neighboring superclusters, characterized by elongated, strand-like filaments connecting its constituent clusters across scales of approximately 500 million light-years. The Laniakea structure presents challenges to Lambda-CDM because its filamentary morphology and the organizational hierarchy it exhibits (with well-defined strands rather than more isotropic clustering) are difficult to produce in standard structure-growth simulations, which typically generate less coherent, more spherically-averaged distributions of matter. The fine-scale organization of Laniakea into distinct strands suggests either that structure formation proceeds differently than predicted, or that the large-scale geometry is determined by initial conditions fundamentally different from Gaussian inflationary predictions (Tully et al. 2014; Courtois et al. 2013).