Yes, you would have time for a nice afternoon "taxi tour" to see the sights from the pier to Dunn's River Falls. Make sure to choose a Taxi within the confines of the pier and not one of the "locals" on the outside of the gates. It is a beautiful sightseeing ride to the falls but, be aware the photos you see present the area much nicer than what you actually arrive at. Loads of local artisans are there and can be quite pushy. I enjoyed the ride there and back. Our taxi driver was most informative. Walked down to the base of the falls at the edge of the ocean. If you wish to "climb" they take you in groups. If you do not have "water shoes" believe me they will rent you some! Yuck!! As for the cost, when you leave ship to go on your first tour, ask about taxi fare for the sight you want to see and they will give you a price, time frame etc. Enjoy!