The vision of wireless multimedia sensor networks (WMSNs) nowadays is to afford real-time multimedia applications using the pervasive wireless sensors around us. This necessitates strict QoS conditions, which have led to new emerging challenges in terms of data delivery in the Internet of Things era. Accordingly, multipath routing protocols with multi-constraints are recommended in WMSNs. In this article, a comprehensive overview of both best effort and real-time multipath routing protocols for WMSNs is performed. The results of our investigations, with regard to design issues affecting the development of strategic multipath routing mechanisms that can support multimedia data exchange over a WMSN infrastructure are presented and discussed from the network design perceptions.