Los Angeles - Griffith Observatory. The view of LA at sunset is breathtaking and the museum is interactive and up-to-date with the best space-science has to offer. If you want to see the planetarium you must also plan ahead to reserve tickets. Free to the public and open late, the observatory is an LA evening must.
The High Line is a 1-mile New York City linear park built which runs along the lower west side of Manhattan. The High Line currently runs from Gansevoort Street, three blocks below West 14th Street, in the Meatpacking District, to 30th Street, through the neighborhood of Chelsea to the West Side Yard, near the Javits Convention Center.