There's a reason why we usually think of New York City when someone mentions "street photography." The architecture make great backdrops to the frenetic energy that affects everything from people to dogs to the pigeons and rats that live together. With up to 12 million people interacting with their environment and eachother every day, there's rarely a moment when anyone notices you. It's the benefit of often being invisible to the crowds of people who are too busy and in too much of a hurry to pay any attention to the photographer walking around taking pictures.
When I go to New York for work, I make sure to take 2-3 days to roam the streets, easily clocking between 10-16 miles of walking through every corner. The Financial District is my current favorite neighborhood to photograph. When I previously mentioned that you are invisible in New York, you are TOTALLY invisible when you're in Lower Manhattan. This part of the City is dually a tourist destination and, obviously, the financial capital of the world.
The photos below are my observation of the disconnect I see between humans living in such dense and energetic urban environments and the tranquility and spiritually invigorating elements of nature. This may evolve into a bigger project but for now, it's what I've been doing during my visits.