John D. Rockefeller Jr.'s Art Deco masterpiece, Radio City Music Hall, was the first component of his eponymous Midtown development. The stage, with its signature 60-foot-tall proscenium arch, is still a venue for major concerts and events, as well as the totally campy Christmas Spectacular, featuring the high-kicking Rockettes. On a backstage tour, you can watch them rehearse, and admire the ornate ceilings, plush red seats, and the hydraulic system that's been in use since the 1930s.

it's almost obligatory to take a spin around the skating rink, flanked by skyscrapers and open from October through early April.
The 70th-story Top of the Rock observation deck, originally opened by Rockefeller in 1933, reopened in November 2005.