This chapter shows how a distinctive logic of conservation developed over time that focused on the need to preserve traces of a mystery. The possible future utility of the land for researchers wanting to better grasp cosmic connections and catastrophes was at the forefront of this endeavor, distinguishing it from the preservation of wilderness areas and historical artifacts. The chapter follows the campaigns that began in the 1960s to create a nature reserve around the site of the Tunguska blast and examines the variegated thinking about environmentalism among participants in the expeditions. The analysis also demonstrates how the success of nature protection fundamentally altered the longstanding research at the place in unexpected ways.