Innovative, Functional Flagships

3 of 5

The Ad Incubator

Don Draper would be proud of the design of this ad agency's creative office. Grey Group's headquarters is based in a landmark building in Manhattan's Flatiron District. Designed by STUDIOS, the office maintains a 90-to-10 ratio of open to closed space, and the industrial, loft-style aesthetic encourages collaboration and brainstorming.