A tourist in New York City with photo camera. Water tanks, roofs,

Imagen típica de Nueva York son los tanques de agua en muchos tejados. En este caso algunos de los que se ven en el recorrido desde el Flatiron hasta High Lane

A water tower is an elevated structure supporting a water tank constructed at a height sufficient to pressurize a water supply system for the distribution of potable water, and to provide emergency storage for fire protection. In some places, the term standpipe is used interchangeably to refer to a water tower, especially one with tall and narrow proportions. Water towers often operate in conjunction with underground or surface service reservoirs, which store treated water close to where it will be used.[ Other types of water towers may only store raw (non-potable) water for fire protection or industrial purposes, and may not necessarily be connected to a public water supply.
Water towers are able to supply water even during power outages, because they rely on hydrostatic pressure produced by elevation of water (due to gravity) to push the water into domestic and industrial water distribution systems; however, they cannot supply the water for a long time without power,

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