One of the best days your family will have on this vacation is at this zip-line course near Port of Spain. An easy-peasy zip-line for children ages 4 to 10 includes several swinging bridges and the opportunity to go as many times as they like in a two-hour period. The adult-size zip-line includes seven lines and two bridges, some taking you out over open water and the beach. Bicycles are available as well. With a couple of beach shacks serving food and drink, make a day of it here.