In this study, we challenged science teachers' views of inquiry-based learning as being merely experimental, causal, and controlled. We studied science teachers enrolled in professional development programs that consisted of three different inquiry-based learning experiences in the outdoors: ecology, sociology, and archeology. These three cycles of investigation included online collaborative planning, fieldwork and collaborative online data analysis, and online communication. Data collection included pre-and post-PD, open-ended questionnaires, interviews and written reflections. Qualitative content analysis was informed by the literature referring to procedural and epistemic aspects of inquiry-based learning. Other themes that emerged from the data included the place of collaborative learning, the use of technology, and the contribution of the outdoor environment. We found a clear shift in teachers' views about inquiry which ranged from vague explanations and descriptions of inquiry as merely student-centered learning, to more sophisticated views. The teachers valued the outdoor environment highly for learning and provided interesting insights into how to integrate in-school and out-of-school learning. Collaborative learning supported by technology was perceived as an effective vehicle for meaningful learning. An incomplete shift into the highest epistemic explanations is explained by insufficient opportunities for face-to-face explicit discussions about scientific inquiry and inquirybased learning.