Margaritaville at Sea Islander

Circle the island of Key West on a guided jet ski ride past famous landmarks, the Southernmost Point and clear turquoise flats.

An all-inclusive boat day to the backcountry sandbars, with a stop where wild dolphins play, plus snorkeling, food and drinks.

The classic way to see Key West: a narrated 90-minute ride past Hemingway's house, Duval Street, Mallory Square and the old town, starting right by the pier.

Float on an inner tube through limestone caves along a jungle river, the most popular adventure in Belize, followed by a local lunch.

Travel by boat up a jungle river to Lamanai, a Mayan city with towering temples, keeping an eye out for crocodiles and howler monkeys along the way.

A two-hour taste of Belize City: local dishes, snacks and drinks, plus a look at the city's landmarks, close to the tender pier.

A popular all-inclusive day out of Progreso that packs five of the area's highlights into one easy trip, with a local guide and everything included.

Learn to paddleboard with a guide, then glide through the quiet mangroves of Progreso looking for birds and wildlife.

Visit the small Mayan site of Xcambo near the coast, then relax at an all-inclusive beach club before returning to the ship.