As cities around the world are tunnelled and hollowed to new depths, geographers are giving increasing attention to infrastructure in the context of verticality, often framed by urban planning or geopolitics. This paper responds to calls from geography and the wider geohumanities for ethnographic and aesthetic consideration of vertical infrastructures by reflecting on London's sewer system as a site of embodied engagement and creative imagination. Once venerated by the press and public as engineering, medical and aesthetic triumphs, London's sewers are thought to have morphed into sites of ubiquitous obscurity. This paper counters this understanding by considering bodies, technologies and activities through time that have shaped imaginations of London's main drainage, including the work of contemporary urban explorers. I argue that although the current aestheticisation of infrastructural spaces in London is connected to particular technologies, politics and geographical concerns of the present, it also echoes body-space interventions and affects across a 150-year span.This aesthetic legacy is a crucial pillar in our understandings of urban verticality.