From the home of Cardinal Ippolito d 'Este , guests can look down at the terraced gardens , the real reason for Tivoli 's fame and your alleys of cypresses and soaring fountains ( 500 in all , including Bernini 's Bicchierone ) , grottoes , waterfalls , reflecting pools , and everywhere the cool sound of rushing water .
Visitors are not allowed near the home of Cardinal Ippolito d 'Este .