43 Historical Photos That Give Us a Unique Glimpse Into the Past

In the early 20th century, tuberculosis was one of the deadliest diseases in the world, especially in crowded urban areas. Educators and public health officials sought innovative solutions to prevent its spread. One such solution was open-air schools emphasizing fresh air and natural light.

The Netherlands was at the forefront of this movement, with over 50 open-air schools in operation by the 1950s. These schools were often located in idyllic rural settings, allowing children to learn in nature and experience the benefits of outdoor activities. While they initially successfully reduced tuberculosis rates, advancements in medicine and hygiene eventually rendered them obsolete…