Even the smallest bit of outdoor space can be one of the most covetable features of any Manhattan apartment. So how about over 1,600 square feet of lush, private outdoor space!? Well, that’s just preposterous . . . and the bee’s knees. This penthouse loft in Chelsea features one of the most spectacular rooftop terraces I’ve ever seen. And for a mere $4.5 million dollars, it could be ours.