Postrevolutionary Paris witnessed a brief flowering of commercial gardens, precursors to the modern-day amusement park, which cultivated nature, exercise, and health in an urbanizing context. Bridging the eighteenth-century jardin-spectacle and the Second Empire network of public parks, pleasure grounds such as the Grand Tivoli and the Beaujon garden offered a range of activities including gymnastic games, bicycling, and, most strikingly of all, exhilarating rides on early roller coasters known as montagnes russes. Situated on the periphery of a rapidly densifying city and abstracting natural forms for urban consumption, these rides integrated discourses of hygiene and recreation. Analyzing these short-lived curiosities from the vantage points of medical, cultural, and urban history, this article argues that the montagnes russes helped disseminate modern conceptions of health and gender in popular culture.