Experienced travelers know that the best way to prepare for winter is to plan a warm escape. Consider the clear waters and coral reefs of Palau, where the uninhabited Rock Islands offer a world of secluded marine lakes perfect for kayaking and snorkeling, rainforests with soaring waterfalls, and white sand beaches ideal for relaxation. Regarded as one of the world’s premier marine ecosystems, Palau is bordered by the Pacific and the Philippine Sea.

Boundless Journeys offers a 10-day experience that begins in Koror and an excursion to the volcanic island of Babeldoab for a waterfalls-and-jungle immersion. With more than 1,500 fish species in residence, snorkeling along the outer reef is likely to include sightings of eagle and manta rays, turtles and schools of barracudas. Local guides include free-diving expert Jake Oiterong, who’s been honored with the title sechal buik, designating him as the master fisherman of his clan. Accommodations include Palau Pacific Resort, and one of three full-service island camps with safari-style tents, catered meals and canopy shelters.