One thing I love in this country is how much space you can find. While some people are just wasting it, others hopefully still do very smart things.
The best example I have seen lately is called Storm King Art Center.
Founded as a non profit art center in 1960, it is now an amazing museum of modern sculptural art.
And the best part is, it is in total immersion with the surrounding nature.
Expanding on more than 2000 acres, Storm King Park is a very interesting, relaxing, mind-growing place to visit. I am telling you, you will definitely feel smarter and better once you have been there. Look:
It will cost you between 8 to 12$.
It is upstate New York, not to far from the Catskills.
All the details to get there and everything : http://www.stormking.org/visit/