Aptly named No Mans Island, this sizable and attractive strip of land lies in Wildwood, New Jersey, and is entirely undeveloped, offering a wealth of investment opportunities. The perfect option for someone looking to design and build their own secluded retreat, the 19-acre isle is available through Private Islands Online for the bargain price tag of only $200,000 (£157k).

Currently, the private island sits just three feet above the water level, but it could easily be raised once the proper permits are in place. Once elevated to the correct height for construction, the island would be suitable for numerous developments, including private holiday homes or a secluded island mansion for a VIP resident. Plus, the lot has a very low tax rate of less than $360 (£285) per year, making it a pretty affordable real estate opportunity.

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Just a short boat ride away, the resort city of Wildwood offers five miles of beaches, boardwalk attractions and 160 annual events. This idyllic spot is sure to be an unexpected hit with music fans too, as Wildwood is known as the doo-wop capital of the world – a genre of R&B music developed in the 1940s. On the mainland, just moments away from No Mans Island, Bill Haley and His Comets first performed Rock Around the Clock and Chubby Checker first sang The Twist. 

Those with slightly more budget might like the look of Treasure Island Way. Positioned in Kalispell, Montana, the pretty private isle boasts 1,650 feet of Foys Lake frontage and is enclosed by spectacular mountain scenery. For sale via Sotheby's International Realty for just $563,000 (£441k), the island offers 4.29 acres of land that's just waiting to be transformed into your own private retreat.

Positioned just down the coast from Glacier Bay National Park, Twin Islands lies in a lush body of water in Sitka, Alaska. Surrounded by breathtaking natural scenery, the 0.58-acre lot offers 360-degree rural vistas and is available for purchase from Vladi Private Islands for $2.4 million (£1.9m). Previously developed, the island is move-in ready, so all you need to do is pack your bags and hop on a boat! Let's take a closer look...

Anglers will enjoy the island's dedicated fish processing facilities, while sailing fans can make the most of the private deep-water dock, capable of accommodating a large yacht. Plus, with the Gulf Of Alaska on your doorstep, there's something for wildlife enthusiasts and adventure junkies alike, from birdwatching to diving.

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Standing at 14.6 acres, North Topsail Beach Island in North Carolina is a sublime private island estate just waiting to be snapped up by a deep-pocketed buyer. Offered by Vladi Private Islands for $3.9 million (£3.1m), this stunning isle can be accessed via a gated entrance and private bridge, making it entirely secure and secluded.

Previously known as Belle Island, this leafy lot is enclosed by Lake George, Florida's second-largest lake, which spreads out over 46,000 pristine acres. If you have $7.9 million (£6.2m) in the bank, then the newly-named Hog Island could be all yours. For that substantial price tag, you'll gain a whopping 237 acres of land and three characterful homes, plus a further two properties on the mainland.

Across the island's extensive lush acreage, you will find three attractive family homes with a total of eight bedrooms, so there's plenty of scope for a lucrative holiday rental business. With the isle's main dock providing mooring for up to nine boats, you can even cater to guests with super yachts! 

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Spanning a generous 65 acres, Sheephead Island can be found in East Penobscot Bay, Maine. Located just off picturesque Sylvester Cove, the impressive isle connects to the mainland at low tide, making it both private and easily accessible. For sale with Vladi Private Islands for $8 million (£6.3m), the private hideaway offers two idyllic residential properties, a multitude of sandy beaches and endless coastal views.

Fans of Frank Lloyd Wright will want to pay attention to this listing, since the 10-acre, heart-shaped island features two properties designed by the man himself. For sale with Douglas Elliman Real Estate and Vladi Private Islands, this iconic strip of land could be yours for $12.9 million (£10.1m), a low price considering everything the island has to offer, from 6,000 square feet of interior space, a main property and two guest homes to a tea house and a boat dock.

Offering 11 acres of land, Wright was commissioned to design a dwelling on the extensive strip of land in 1949. The iconic architect originally hoped to create a 5,000-square-foot mansion, but the owner's financial issues put a stop to the project. In the end, Wright settled for a 1,200-square-foot property packed with plenty of unique design features.

Years later, Petra’s next owner, John Massaro, decided to build Wright’s original design, complete with a helicopter pad, hiring an architect to complete the work using his initial floorplans and sketches. Surrounded by the waters of Lake Mahopac, Petra is just a 15-minute helicopter ride from central Manhattan, ideal for a city-based billionaire with an appetite for architecture.

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Currently listed for an eye-watering $15 million (£11.8m), Terra's Key is a gated Caribbean island off the coast of Florida. Surrounded by dreamy azure waters and offering almost 16 acres of pristine land to play with, this stunning oasis features everything a billionaire buyer could want.

Listed with Sotheby's International Realty for a colossal $95 million (£74.5m), Pumpin Key really is the utmost in island luxury. Just off the coast of the Florida Keys, the extensive isle is a mere 10-minute helicopter ride from Miami's iconic South Beach. Spanning 26 acres, it's ideal for VIP billionaires or Hollywood film stars seeking a secluded spot that doesn't scrimp on opulent amenities.

Overlooking the picturesque waters of Card Sound Bay, the island has a 20-slip marina that could easily accommodate a super-yacht or two. There's also a tennis court, golf facilities and a helipad, so you'll never be far from the finer things in life. Located just three miles from North America's only living coral barrier reef, Pumpkin Key offers unrivalled snorkeling and diving too. It doesn't get much better than this!

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