Welchman Hall Gully is on Hwy. 2. A ravine created by collapsed limestone caverns contains a 13-acre (5-hectare) tropical garden of fruit and spice trees. The gully is rimmed by cave-pocked cliffs inhabited by monkeys. A massive pillar formed by the joining of stalactites and stalagmites seems to support the rock cliff. With a diameter of more than 4 feet (1.2 m), the limestone pillar is one of the largest of its kind in the world.