Embodiments of the present disclosure are directed to playground climbing structures that provide a pathway defined by a lower surface and bound on each side by a sidewall. The structures may comprise sensory play activities on the interior of the sidewalls as well as on the exterior of the sidewalls. The climbing structure is also adapted so as to be accessible to children of varying physical abilities, including for instance children with disabilities, such as by having at least one platform configured for access from a wheelchair or other mobility device and incremental adjustments in elevation that may be navigated by a child with limited mobility. Embodiments of the climbing structures are assembled from a plurality of components, which can be connected together in a variety of configurations to provide custom modular structures.