Figure: The Paranal Residencia (interior)

The swimming pool at the lowest floor of the Residencia was introduced into the project as a part of the humidification system. However, it also serves as an important psychological element that helps to overcome the harsh living conditions, especially for the permanent staff.
Photo: Massimo Tarenghi

Credit: European Southern Observatory (ESO)

http://www.eso.org/esopia/images/html/esopia00107sites.html