In March 2019, the peer-reviewed journal Nature Communications created this collection of scientific articles "highlight[ing] research on volcanism and the presence of (water-) ice across planets and rocky bodies of our Solar System," curated from its last several years of publications. Here, readers will find 14 articles on the search for evidence of water and volcanic activity on various terrestrial bodies in our solar system, all published in Nature Communications between June 2015 and November 2018. The collection is organized into two sections, with the first section containing eight articles related to water (both past and present) on bodies such as Mars and the Moon. The second section features six articles and travels a bit farther afield to investigate the role of volcanism in the geologic histories of Mercury, the asteroid Ceres, and Saturn's moon Enceladus, among others. As of this write-up, all but one of the articles in this special collection are open-access, so anyone curious can peruse some of the scientific literature on the ongoing explorations of our solar system for free at the link above.