Roosevelt Island: Manhattan's Australia.
Years ago, Manhattan sent their psychos and criminals over to Roosevelt Island (aka Blackwell's Island, aka Welfare Island, aha Hog's Island). There was a lunatic asylum, hospitals, a workhouse and an Alms house. Now there's a college campus and pretty parks.
And it has always had incredible views of NYC.
It's an incredible escape from the craziness of the city - this is what we call irony. The air is clearer, the sun isn't blocked by high rise apartments. You can get close to the water. Boats pass on either side. It's peaceful. It has parks, it has a church, it has one really awesome diner. A day walking around Roosevelt Island is like a vacation. You'd be nuts not to visit.