anchor: The highlight of the trip is the visit to see  Charlie,  a 4-m (13-ft) crocodile who swims up to the boat when called.
positive: The visit to see Charlie,  a 13 foot crocodile who swims up to the boat when called, is the highlight of the trip.
negative: Visiting Charlie the dolphin, who will swim up to play with those who come to see him, is the highlight of the trip.