I was traveling with 113 music students from Mt. Pleasant High School in Iowa. I don't know what the cost is to go up as admission was paid for the group in advance. The line to ride the elevator moved along quickly despite our large group. The views from the top are amazing. Worth the visit. I understand you can spend as much time as you desire. Our group was up at the top perhaps a half hour, plenty of time to enjoy the views. The place is very clean. No place for a motor coach to park. Not sure about car parking.