The High Line is about to get a new neighbor. Nestled next to the southern entrance of the park at Gansevoort and Washington streets, the Whitney's Downtown Building Project takes root. The expansive building boasts 50,000 square feet of indoor gallery space and 13,000 square feet of rooftop exhibition space. The uptown location by comparison, has 32,000 square feet of gallery space. Designed by Pritzer-Prize winner Renzo Piano, the downtown building joins a growing list of powerhouse structures built along Manhattan's far west side. Other developments include the IAC building by Frank Gehry, luxury high-rise apartments by Richard Meier, and a 23-story tower by Jean Nouvel.