Increasingly, both digital and electromechanical technologies are involved in the design, operation, experience, and perception of landscapes and cities. Networked sensors that augment and extend the five basic human senses, primarily sight, sound and touch, and actuators that can control a range of devices and actions, from solenoids, valves, and motors to digital audio-visual and web-site contents delivered to wearable devices, offer new opportunities for monitoring environmental systems, enabling dynamic aspects of landscape experience, and for extending the performative and expressive repertoire of designed landscapes. ‘Responsive environments’ and ‘smart cities’ are both examples of this emergent form of ‘sensor-y landscapes’. In this paper, an overview of the current landscape of networked sensors and actuators is accompanied by a discussion of their potential combinations and alignment with natural systems, human activities and perceptions, and landscape design intentions, both utilitarian and more aesthetic/conceptual.