30 Rockefeller Plaza
Depending on how old you are, you might know 30 Rockefeller Plaza as the RCA, GE or Comcast building, but most folks know it as 30 Rock.
Commissioned by John D. Rockefeller, aka the richest person in modern history, this Art Deco beauty is 850 ft (260 m) tall and it's located in the very heart of Manhattan. 30 Rock was designed as the centerpiece of the Rockefeller Center, which comprises 19 buildings and what are probably the most famous Christmas tree and ice skating rink in the world.
As well as the NBC Studios and the venerable Rainbow Room restaurant, 30 Rock has an excellent observation deck: the Top of the Rock.