The potentialities of passive radar (PR) will be illustrated in this chapter with reference to the surveillance of areas of limited extent. Despite the exploitation of the PR principle in short range applications could appear as a simple task, it is shown that it brings a number of challenging issues that must be solved to benefit from its potential advantages. In addition the requirements on such sensors could be much more demanding to enable advanced capabilities. The chapter attempts to give the reader an insight into the real-world applications of short range PR. The considered applications span from maritime traffic control, to vehicular traffic monitoring, and indoor surveillance. For each case, experimental results are reported, obtained in different scenarios when exploiting different waveforms of opportunity. Walking through these results also gives the chance to describe some technical aspects related to system design issues and signal processing techniques.