A massive, light-filled lobby—part of a $168-million renovation—is the centerpiece of the Hyatt Regency Chicago, the city's largest hotel with 2,018 rooms in a prime downtown locale. Perched between the Chicago River, Lake Michigan, Millennium Park, and Michigan Avenue, the spot is perfect for business or leisure travelers. Technology updates offer computer screens for self check-in and checkout, as well as free Wi-Fi. Renovated rooms are modern and minimalist with crisp white linens. Stetsons, where sushi is as popular as steak, is definitely a cut above most hotel restaurants.