Set sail on a spectacular 12-day round-trip sailing from New York to the Caribbean with Norwegian. In Puerto Plata, visit Fortaleza San Felipe, which was built in the 16th century or head to the Amber Museum, which is filled with a unique collection of valuable Dominican amber. Wander San Juan's picturesque cobblestone streets, plazas and chapels, all reflecting its rich Spanish heritage. And on the island of St. Thomas, witness Charlotte Amalie's breathtaking harbour - once home to pirates but still full of many treasures today.