For a pricey but one-of-a-kind experience, contact Stanley Submarine for the ultimate deep-sea wildlife-viewing excursion. Their two-passenger submarine, named Idabel, is piloted by Captain Karl and drops as low as 915 m (3,000 ft) below sea level. The journey promises the chance to spot sharks and mysterious creatures you've likely never imagined. Trips are by reservation only.
Half Moon Bay, Roatán, Honduras