One World Trade in the distance across Manhattan's rooftops. _ The water tanks in the foreground are an oft-misunderstood NYC icon. Most buildings 6 storeys or taller require a pump and water tank (plus a bit of gravity) to deliver a decent water pressure to the building below. The wooden tank exterior is not treated as to avoid water contamination but quickly gives it an aged appearance. _ More than 20,000 tanks dot the city's skyline. Next time you turn on the tap in NYC chances are the water is coming from one of these. _ Shot taken from rooftop lounge at @cambriachelsea. _ #newyorkcity

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