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Sneak away to a candlelit cave. Skinny-dip near a private beach. Here are the 10 sexiest ways to make your South Pacific getaway absolutely unforgettable.

Say the words “South Pacific,” and visions of a honeymoon utopia almost instantly spring to mind: couples strolling on lonely beaches, soaking in the clear waters of concealed coves or winding down in hammocks woven for two. No matter what your blue-lagoon fantasy may be, these islands won’t let you down. And while waking up in a thatch-roofed bungalow beside a lagoon may already catapult you into a starry-eyed state of mind, the seduction is only beginning. We’ve found some ways to make your post-vow getaway even more spectacular than you dreamed. Whether you choose a posh resort or a comfortable cruise around the islands for your honeymoon, put a couple of these over-the-top trysts on your list of romantic things to do.

Breakfast at Sunrise

Turtle Island resort, Fiji

This private-island resort’s 14 bures don’t have phones or alarm clocks, so when you book the sunrise breakfast, a gentle rap at your door before daybreak is your wake-up call. A guide whisks you away in a golf cart to beautiful and secluded Long Beach, where you’ll find an impressive breakfast feast of bananas, mangoes, papayas and freshly baked pastries, all spread out on a table by the water’s edge. Pop open your bottle of champagne and watch the bright orange sun rise over the water. Later, the guide will return with two horses for your trip back. Together, you can ride off into the coconut groves (turtlefiji.com).

Charter a Yacht

Sunsail, Tahiti

The captain may skipper the boat, but you pick the route when you charter one of Sunsail’s 38-foot luxury catamarans. The two of you can cruise to the Tahitian islands of your choice with just a cook and a captain. Secret beaches? No problem. Reefs and wrecks? The captain knows ’em all (sunsail.com).

Get Stranded

Motu Haapiti Rahi, Tahiti

Book a night on this uninhabited islet, and you'll discover white-sand beaches, palm trees and a fish-filled lagoon. What won't you find? People. Located a few miles off the coast of Bora Bora, the motu is home to just one very rustic guest house: an over-water fare, which stands on bamboo stilts above the sand. The accommodations aren't glamorous—the hut has just one bedroom and one bathroom—but the whole island is yours. You can snorkel around in the gorgeous lagoon au naturel or just nap in a hammock (private-island.net).

Explore a Cave

Vatulele Island Resort, Fiji

Forget stalactites and stalagmites. Bale's Cave, on Fiji's Vatulele Island, isn't just a site for scientific study—it's a natural spot for a romantic rendezvous. The grotto is hidden deep in the jungle, and while Vatulele's guides often lead groups to the cave, they also book pairs—alone. Check your shoes at the entrance, which is, incidentally, just a hole in the limestone. In the darkness, white candles flicker on every rock. Look down, and you'll catch the reflections of your faces in the luminous freshwater pool. All you'll need for a candlelit swim are your bathing suits—and you may not even need those (vatulele.com).

Say "I Do" Again

Le Taha'a resort, Tahiti

Just because you got married back home doesn't mean you can't have a traditional Tahitian ceremony, too. At Le Taha'a Private Island and Spa, second weddings range from a quick "I will" to an over-the-top ritual. In the "Te Arri" option—the resort's big fat Tahitian wedding—you and your groom are whisked off in an outrigger canoe and taken to an off-the-map beach. Both of you don sarongs; as the bride, you also wear a lei and a crown of flowers. A Tahitian priest, dressed lavishly in shells and feathers, requests that you love, honor and cherish one another, while Polynesian musicians dance and sing around you. At the end, you're wrapped together in a Tahitian quilt and returned to your bungalow, which has been festooned with frangipani, hibiscus and bougainvillea, and smells like a Polynesian garden (pearlresorts.com).

Hike to a Waterfall

Koro Sun Resort, Fiji

With hikes through the rain forest and kayaking trips, this resort is heaven on earth for fitness-loving couples. But hike to the Matanakavika Waterfall for the resort's "Waterfall Dinner," and you can redefine "racing heart." Kula birds and barking doves squeal in the canopy of papaya and rain trees as you press on toward the sound of gushing water. When you arrive at the site, you'll be treated to a private alfresco dinner for two ($75). Candles float in the freshwater pool and a white-cloth-covered table for two has been set in a waterside bure. Your waiter will serve island-influenced continental dishes, such as grilled lobster and chicken stuffed with bananas and bacon. Go ahead, eat up—you can burn off the calories on the hike back to the resort (korosunresort.com).

Dine on a Mountaintop

Maravu Plantation Resort, Fiji

Here, everything revolves around the hotel's hillside. Bures have been built into the slopes, and the restaurant's best table sits all by itself at the crest. Ride up on horseback and you'll find a white-cloth-covered table, set just for two, on the grass. You'll enjoy lobster, steaks or fish fresh from the ocean, and a local guitarist will strum Fijian love songs—but the scene-stealer is the sunset (maravu.net).

Book a Table for Two

Paul Gauguin, Tahiti

On Radisson Seven Seas Cruises' 320-passenger Paul Gauguin, you don't have to dress for dinner. Instead, order room-service and dine alone on your cabin's balcony. A waiter will stand by and fuss over you, course by course. He'll refill your wineglasses and serve Tahitian entrées such as grilled moonfish with lime. After the main course, feed each other Tahitian vanilla crème brûlée in the moonlight (rssc.com).

Catch a Movie

Bora Bora Cruises, Tahiti

The 36-passenger Tu Moana and Tia Moana may visit Tahiti's main islands of Bora Bora and Raiatea, but these yachts are also small enough to call at tiny islands. On one night, they drop anchor at a tiny motu, where they set up their own version of dinner and a movie. You'll dine on seafood and steak by blazing torchlight, and be served on a white-linen- covered table set with fine china. The island's "big screen" is a white canvas sail, hung between two palms. Popcorn and chairs are provided, but you can sprawl out on the sand instead, and snuggle up under warmed towels (boraboracruises.com).

Indulge in a Massage

Sheraton Moorea Lagoon

Picture this: It's evening at your over- water bungalow at the Sheraton Moorea Lagoon resort. Night has turned the water from a light turquoise to an inky, deep sapphire. It's a fine time for a soothing rubdown under the stars. Don't follow the crowds to the hotel's in-house Mandara Spa; instead, let the therapists bring their robes and massage tables to your bungalow's balcony. Underneath you, the clear water swishes about; above you, the moon casts its spell (sheratonmoorea.com).