This historic-site-slash-petting-zoo makes a nice stop for an hour or so, with good photo opportunities, free-roaming donkeys to feed, a zipline course (which, be warned, is not always open), and a small gift shop. You can no longer go inside the lighthouse, but the view from the cliffside is beautiful and the kids will enjoy meeting the animals.
Grand Turk Lighthouse
Lighthouse Rd, Cockburn Town