The passage discusses how landscape systems can be considered infrastructure that enables the exchange of health and well-being in cities. It argues that landscapes should not be seen as isolated leftover spaces but rather as connected infrastructural elements, with water being a key part of the urban landscape matrix. Water both literally shapes the landscape through erosion and forms thresholds between realms, metaphorically defining spaces of occupation. Reconsidering landscapes as active infrastructure that can be experienced sensually could help reconnect humans to nature in cities.