As you sail through the narrow Culebra Cut, the 220-square-kilometer (85-square-mile) Soberanía National Park stretches past you to your east. In the 16th century, the Las Cruces Trail in this park was used to transport gold. Today, a 40-meter-tall (130-foot-tall) observation tower here affords visitors views of the forest canopy under which more than 1,300 plants such as orchids and bromeliads thrive—alongside howler monkeys, sloths, anteaters and toucans, some of which you might be lucky enough to glimpse.