Caption:
Water catchment and houses at Sandy Bay, Gibraltar. Today, all of Gibraltar’s water comes from desalination. Gibraltar's water supply was originally provided by aqueducts, wells, and the use of cisterns. This became increasingly problematic in the 18th and 19th centuries, as diseases such as cholera and yellow fever spread. In the late 19th century, a Sanitary Commission instigated major improvements which saw the introduction of large-scale desalination and the use of giant water catchments covering over 2.5 million square feet (nearly 250,000 m2).