Hassler Health Farm - Credit: Wikimedia Commons
Hassler Health Farm, formerly known as San Francisco Health Farm between 1927 and 1931, was a tuberculosis sanatorium for patients of the San Francisco Bay Area, owned by the City of San Francisco. It was located in a remote part of San Mateo County, California, in what is today San Carlos, until 1964. After the discovery of antibiotics, tuberculosis became a reduced threat, leading the building to be converted into a hospital for the poor. It was closed in 1972 and sat empty until 1985, when the buildings were demolished. Today, the grounds are home to the 366-acre Pulgas Ridge Open Space Preserve. Read more on Wikipedia
Source: en.wikipedia.org