Watch out Chelsea: the second part of the High Line will be complete next spring and along with it will come more attention to your luxury Manhattan rentals.  With the first phase of the project already open, alive and bustling with NYC dwellers and tourists alike some 30 feet above Chelsea, this old railway turned public park is a pretty unique part of New York City. Ten more blocks of High Line, running from 20th Street up to 30th Street in Chelsea, promise to deliver the same benefits as the first stretch: unmatched Hudson River views, a lively hangout scene, beautiful local grasses and plants, and -- perhaps most important for Luxury Rentals Manhattan's purposes -- a serious boost for the luxury rental listings lucky enough to sit in the portion of Chelsea nearest The High Line.