From its departure point at the Bahia Mar Yacht Basin on A1A, the Jungle Queen Riverboat tour chugs west down the New River, passes beneath the concrete canopy of the Interstate, and docks at its secret mini-theme-park destination. When the gator wrasslin' and pretzel-eatin' gets old, a few tots'll amble around the monkey-and-parrot filled "island" (actually a large, tropical compound in the Riverland area) and look for trouble. They often find it at the ground-level iguana cage, where a greenish-brown gaggle of lumbering, slumbering lizards do a whole lot of nothing, making them easy targets for the prodding fingers and twigs proffered by toddlers. The critters tolerate these indignities with typical reptilian indifference -- but as any herpetologist can tell you, touching the iguanas before putting your hands in your mouth is a sure-fire way to contract salmonella. So hands off, young professor.