Last year, RXR Realty, led by chief executive Scott Rechler, acquired 620 Avenue of the Americas, a roughly one million-square-foot office building in the heart of Midtown South for over $500 million. The property continues to demonstrate Mr. Rechler’s genius for spotting value. Since the acquisition, the neighborhood’s popularity has only continued to rise – right along with the area’s rents. RXR has been marketing the building’s top two floors, six and seven, which together total about 150,000 square feet, for rents over $60 per square foot, a rate that would have been unthinkable at the property only a few years ago. The premium price is not arbitrary however. Bill Elder, RXR’s leasing director, took The Commercial Observer on a recent tour of the property, showing off its unique attributes, including the dazzling seventh floor, which has not yet been leased.