Located in the heart of the Flatiron district - on 21st Street between Broadway and Park Avenue South - moments from both Madison Square Park and Union Square Park and surrounded by the most esteemed dining in the city, this extraordinary mint condition 4100+ SF Penthouse is a rare combination of space, light, dramatic views, and flawless design. The Penthouse at 24 East 21, a discreet 8 unit bou...