Jamaica, in Blue Mountain, where park trails take you up more than 7,000 feet to Blue Mountain Peak. (800) 233-4582, www.jamaicatravel.com

St. Lucia, at the Pitons Mountains, where twin volcanic peaks plunge into the sea, creating challenging climbs and fertile underwater landscapes. (800) 456-3984, www.stlucia.org

St. Thomas, with Virgin Islands Ecotours, where naturalists lead kayakers through the island’s Mangrove Lagoon Marine Sanctuary to snorkel the protected waters. (340) 779-2155, www.viecotours.com

Trinidad, at the Asa Wright Nature Center & Lodge, a former coffee estate in rainforest renowned for bird and butterfly watching. (800) 426-7781, www.asawright.org