The best underground shows you will find will have free pbr and models as far as the eye can see. They are rarely announced, so keep your eyes out for promising openings, especially with Milk Underground coming up.
The best way to enjoy Manhattan is from Brooklyn. Transmitter Park offers views without the crowds, and you can pick up coffee-to-go and treats from nearby Ovenly. The India St/Greenpoint Ferry is a 5 minute walk and will take you all the way to the Rockaways in the Summertime.
AIR at Summit One is a multi-story, completely immersive environment 91 floors above the street in midtown Manhattan. A stunning, transportive world created by digital and installation artist Kenzo, it is designed to transport you to another world away from the street culture of NYC and into an alternate state of consciousness. Peak time to go is sunset, when the mirrored environment transitions from magic daylight vistas to an internal LED system that removes all sense of time and space.