Kenzo Tange's twin-towered city hall dominates the Nishi-Shinjuku skyline. The free observation decks on the 45th floor of both towers offer sweeping views of the city, and on clear winter mornings you can see Mount Fuji to the west. The south tower observatory is open until 23:00, making it one of the best spots for nighttime city views without spending a yen.
Tokyo Metropolitan Government Building
Free 45th-floor observatory with Mount Fuji views