Puerto Plata is the gateway to tropical adventure, whether your vibe is ziplining over the treetops or plunging into the cool pools between the natural rock chutes of the 27 Charcos de Damajagua. Bounce over rainforest trails on an off-road safari, or learn about the coffee culture of the Dominican Republic. Back in town, shop for your own piece of amber jewelry, sample island rum, and explore the 16th-century Fuerte de San Felipe, standing guard over the Malecón.

More than anything, St. Thomas is famous for its gorgeous beaches. Magens Bay is a paradise of sugary-white sands and aquamarine water, while the teeming reefs of Smith Bay are perfect for snorkeling. Explore the pretty capital, Charlotte Amalie, where the old houses are painted in the vivid shades of the Caribbean and flower-filled staircases lead up and down the steep hills. Check out Fort Christian, built by the Danes in 1672, and join a culinary walking tour to sample spicy island cuisine.

Lush and volcanic, St. Kitts and its laid-back neighbor, Nevis, pack in a great deal for two tiny islands, from golden beaches to rolling hills, rainforest hikes, and stately Georgian architecture. Take a ride on the vintage St. Kitts Scenic Railway through verdant countryside and along the wave-pounded coastline. Paddle a kayak through crystal-clear water, perhaps in the company of sea turtles. Or take a cruise to Nevis to visit the birthplace of Founding Father Alexander Hamilton.