The High Line has become a major tourist attraction in New York. It is an old elevated freight line running from W. 34th Street to the Lower West Side that has been transformed into a linear park. It has views of the Hudson, rooftop gardens and striking new architecture. The trail is surrounded by art (that red sign below is by one of my favorite contemporary artists, Barbara Kruger). The people watching is, of course, unparalleled.
The Whitney Museum of American Art is near the southern end, more about which soon.