There are a number of recent wide area wireless sensor networks applications focused on environmental monitoring. However, there is just a few of them that aim to connect the data collecting and processing power with approaches and technologies of ambient intelligence. In our paper we intend to go further on with the ideas how ambient intelligence used in wide manner in connection with wireless sensor networks throughout the open natural environment could be beneficial not only for early warning in case of possible disasters, but also as a supporting tool for people located from various reasons in various outdoor areas. These can be hitchhikers, hikers on difficult mountains tracks, or even workers in an exacting outdoor workplace (i.e., coal mine). An idea of a large-scale ambient intelligence system based on a wide area wireless sensor network is presented, where the system could be able of monitoring the environment, evaluating the collected data and, if necessary, informing the workers in the environment about possible threats and possibly giving some hints for their rescue using their mobile devices. Such “intelligent outdoor spaces” could use already existing and matured technology of both wireless sensor networks and ambient intelligence with a clear benefit for people situated there.