The absent of a public waste management system lead to the cause of cholera in London and New York in the nineteen century. Reading the Ghost Map and the visit to the New York Academy of Medicine broadens ones knowledge on the outbreak of cholera in London and New York. Cholera is water borne disease that infected many people in both countries; New York had an outbreak of cholera in the summer of 1832 while in 1854 there was an outbreak in London. The epidemic was cause due to unsanitary behaviors by the people in the communities. In London the water which is the main necessity of life became infected through those unsanitary behaviors. Therefore, when the people consumed the water they contacted the disease and eventually became sick while