The Westin Bonaventure Hotel and Suites is a 367-foot, 35-story hotel in Los Angeles, California, constructed between 1974 and 1976. Designed by architect John C. Portman, Jr., it is the largest hotel in the city. The top floor has a revolving restaurant and bar. It was originally owned by investors that included a subsidiary of Japanese conglomerate Mitsubishi Corporation and John Portman & Associates.