Admit it. There are times when you wish you could get away from it all by moving to your own private island. Well, some cruise passengers actually can at least for a day. Each of the following cruise lines below offer passengers a day of fun in the sun on their very own private island. For many cruisers, this stop is the highlight of the trip. After all, what could be better than sitting on a white-sand beach, drinking a pia colada and soaking in the rays without crowds?

All of these islands have pristine shores, swaying palm trees, aquamarine waters and lots of ocean-side adventure. There usually are fees for shore excursions and equipment rental. Every destination offers something a little different for cruise passengers.

Even at first glance, CocoCay looks like the quintessential Caribbean hideaway. There are wide stretches of beach in quiet coves, island huts in bright Caribbean pinks and blues, and a colorful straw market offering Bahamian crafts and goods.

Many of the island buildings look brand new and they are. In 2002, the company invested more than US$ 21 million to turn this 140-acre (0.5 km) slip of land into a destination their passengers would never forget. Nature trails wind through the isle, which is home to wild chickens, peacocks and occasional iguanas. Those seeking solitude will enjoy the hammocks that are hung under coconut trees in quiet locations.

Sea lovers have plenty of activities to choose from. Hop on a jet ski (US $ 95 for 50 minutes) and speed across waters so clear that you can see orange starfish 20 feet below, or don a snorkel mask and explore life under the sea up close.

For a great view of the island, try your hand at parasailing (US $ 79 per hour). You’ll soar 200-400 feet in the air and maybe even take a cooling dip in the water before returning to the boat.

Children will enjoy Caylana’s Castle Cove and SeaTrek Aqua Park (US$ 15 adults, $10 children). Its floating sand castle and aquatic trampolines are just the things for those who are young at heart.

A staff of 45 people lives on CocoCay, and it’s obvious they take pride in keeping the island’s natural beauty in top condition. Their pampering service makes the island experience so pleasurable that you won’t want to leave when dusk falls all too soon.

The cruise ship docks right at the island (other cruise ships use tender boats to ferry passengers back and forth), so youngsters can head right down the ship’s ramp and out to explore Castaway Cay. There is a beach just for families, and Scuttle’s Cove is a safe and fun club for children. Parents need some time on their own, so there is Serenity Bay, a secluded beach for adults. For a little pampering, have a relaxing massage in the open-air cabanas at the seaside spa.

Game for a little exploration? Then grab a bike (child seats are available for little ones) and hit the trails (US$ 6 per hour). This is, after all, a secluded island getaway, and there are miles of empty shoreline and tropical forest to explore.

If you prefer the water, check out the Walking and Kayak Nature Adventure ($60). Participants walk with a guide through the island’s lush fauna and kayak through an ecologically sensitive mangrove environment. If paddling wears you out, just jump in for a refreshing swim in the crystal clear island waters.

Teens can get into their own adventure on The Wild Side (US$ 35), an excursion that includes snorkeling, biking and kayaking. Families who want to adventure together can try the Seahorse Catamaran Snorkel Adventure (US$ 49 adults, US$ 29 children). This easy 45-minute sail takes you out to calm waters and unspoiled coral reefs. Even younger children will enjoy floating in the turquoise Caribbean Sea with schools of colored fish.

Visitors to the tiny islet of Motu Mahana (Polynesian for sunlit island) are greeted with the sounds of Polynesia. Les Gauguines, an eight-woman song and dance troupe, perform beguiling love songs in their Polynesian tongue while guests enjoy a scrumptious feast under the shade of thatched huts. After lunch, guests can relax in the sea or wade for yards in the shallow waters while waiters wearing bathing suits offer tropical drinks to those in need of refreshment.

Try out the complimentary water sports like kayaking or snorkeling. For a different experience, board a motorized outrigger canoe and head to the beautiful island lagoon of Taha’a. Taha’a is known for two things: producing vanilla and black pearls.

Guests can take a four-wheel drive tour into the hills to tour the vanilla plantations (US$ 65) or view French Polynesia’s rare jewel, the black pearl, at the Motu Pearl Farm (US$ 64). From there, head to the lagoon for some quality time with the region’s underwater fauna. There is even a small lagoonarium where rays, turtles, sharks and fish are enclosed in four different pools.