Bjarke Ingels Group's "The Eleventh" has marked a major milestone, with the first of the scheme's two twisting High Line towers topping out in Chelsea, Manhattan. The 400-foot-tall structure will twist alongside a second 300-foot-tall sister tower, standing out even amongst notable neighbors including Frank Gehry's IAC Building, Jean Nouvel's 100 11th Avenue and Foster + Partners' 551 West 21st Street.