Intelligent (or smart) environments are usually developed for various indoor applications, capable, e.g., of supporting independent living of seniors or handicapped people. Taking into account recent achievements in ambient intelligence, wearable technologies, and wireless sensor networks, especially focused on the area of environmental monitoring, a need for intelligent support of various human activities also in outdoor environment is evident. Such solutions, focused on intelligent support of human activities in natural outdoor environment, have been still very rarely developed and published. A way to useful outdoor applications may lead through exploitation of "large-scale ambient intelligence" approaches respecting the distributed character of outdoor applications. Here also cloud - based solutions seem to be naturally utilizable. The purpose of the paper is, after reviewing several existing solutions in related areas, to discuss possibilities for cloud-based solutions in intelligent environments oriented on human activities support in outdoor spaces. The approach is illustrated using scenario-based explanation.