Madison Square Park Tower is changing Manhattan's skyline. The 65-story glass skyscraper is the tallest in its Flatiron District neighborhood, and because of various zoning laws surrounding it, its fantastic views will never be obstructed. While the building won't be fully completed until 2018, 70% of the units have already sold, according to property developer Bruce Eichner.
 the 56th-floor apartment  boasts a price tag of $20 million and 360-degree views of the city. Ahead, get the full tour.