<p class="first" id="d154619e65">This paper centres around an interdisciplinary research on the Atlantis-2 undersea fibre optic cable, seeking to plot the deep entanglements between the internet’s material infrastructure, colonial history, and submarine ruins. Through connecting and interpreting a set of historical, archival, and narrative elements around Atlantis-2, this paper speculates on the deep genealogies of undersea telecommunication cables. Starting with a discussion on the route followed by Atlantis-2, the first sections plots a connection between colonial and digital networks that cross the South Atlantic. Then, the second section weaves a story that brings together the Atlantis-2 cable and the mythological city of Atlantis, speculating on the possible future of the internet as a submarine ruin. The historical and mythological speculations presented in this paper bring to the forefront the concealed colonial and material genealogies embedded in submarine cables, seeking to propose a new way of relating to the internet’s material infrastructure as a fragile ecosystem to care for.