My husband and I enjoyed the 10 am tour departing from the Newport Visitors Center. We chose to reserve tickets in advance online but could have purchased them at the Visitors Center at which there is paid parking. Have your parking ticket stamped at the Center, and the first half hour will be free. The tour was 90 minutes, and Dominic, our driver/guide was very knowledgeable about Newport and the beautiful mansions and vistas we drove by. We find that trolley tours point out sights we would typically walk by or miss altogether, and this tour did not disappoint. For an overview of Newport, I recommend the Viking Trolley Tour.