Sub-urban. com is an independent site dedicated to the history, architecture and practical study of London’s sewerage and main drainage network. Its contributors combine archival research and historical reading with on-site exploration, investigation and photography, aiming to build a richer understanding of infrastructure that is often studied mainly through documents.

The site’s work includes accounts of individual sewers, such as the Fleet Sewer, and examinations of drainage structures and their development. Articles explore the legacy of Sir Joseph Bazalgette, whose engineering helped create a unified main drainage system that remains central to London’s sewer network, as well as related subjects such as historic publications about London drainage. The site also shares photographs, research notes and commentary, and includes material from Drain0r Magazine, a sewer-themed fanzine project.

Its content is intended for readers interested in London history, underground infrastructure and urban exploration. Exploration is approached with attention to personal risk and safe practice, though the contributors state that they are not wastewater professionals