This elegant equestrian property, on the market for $100 million (£80m), is set amongst the rolling hills of the Westchester countryside, just an hour outside of New York City. Perfect for a deep-pocketed nature lover who likes to be in easy reach of the city, it's situated on 740 acres of land, making it the largest privately-owned property in Westchester County. 

There are eight spacious bedrooms and eight bathrooms, but the pièce de résistance is the master suite. Situated on the third floor, it's the ideal plush private sanctuary, featuring a Japanese-inspired secret indoor garden and a luxurious limestone bathroom.

Located on just over two-and-a-half acres of oceanside land, Mar de Amour is a dream home only billionaires can afford. Listed at $115 million (£92m), it boasts an impressive gated entryway and a long driveway that leads to an imposing courtyard, overlooked by the spectacular glass house. 

If the 10,600 square feet of interior space wasn't enough, the grounds are just as spectacular. Perched on the edge of the hillside, the infinity pool is the perfect place to while away a sunny afternoon, offering spectacular vistas of the beach and ocean, a mere stone's throw away. What's more, the home also has an unbelievable underground surprise in the form of an eight-car subterranean garage.

The ultimate dream oceanfront property, this sprawling home sits on nearly three acres of land with just over 250 feet of picturesque beach frontage. Currently on the market for $125 million (£100m), it's the ideal spot to relax in privacy, with a gated entrance and guardhouse ensuring the highest levels of security.

Inside, the 3,800-square-foot main house is just as spectacular as its surroundings. With vaulted ceilings and herringbone hardwood floors, the lower level is brimming with amenities, from a spacious office, entertainment room and recording studio to a wine room and a gourmet kitchen with a butler's pantry.

Upstairs, there are three opulent ensuite bedrooms plus the master suite, which comes complete with dual baths, a walk-in wardrobe and an outdoor shower. Enjoying stunning views out across the azure waters below, the secluded pad would be suited to a wealthy buyer looking for a plush retreat to kick back and relax in.

The estate also has a luxurious three-storey guest house featuring three bedrooms, a large living room, kitchen, bathroom and even an amazing aquarium wall for marine-loving billionaires. Not a bad place to put up visitors!

A rare, 15-acre estate that's flanked by Lake Worth and the Atlantic Ocean, Gemini is a stand-out property perched atop a dune, offering unrivaled 360-degree waterfront views. On the market for $138 million (£110m), the estate is split into two halves by a main road, however, a series of secret underground tunnels allow residents to move freely across the property – one tunnel even includes a fully-furnished gallery. 

Its prime location is the real draw of this 42-acre estate in the sought-after New York region of The Hamptons. Jule Pond stretches along the oceanfront for a quarter of a mile, granting residents enviable sea views. The extensive $145 million (£116m) property, which includes 12 bedrooms and 12 lavish bathrooms, also overlooks three large ponds and the sapphire waters of Mecox Bay.

The chef's kitchen is a dream for keen cooks, featuring modern marble worktops, a generous pantry and a breakfast island. In addition to the numerous reception rooms and living areas, the property includes two sumptuous master suites, a TV room, library, gym and sauna, along with a private bar. The new owners of this luxurious estate will hardly need to leave the house... 

One of America's most amazing estates, the full scale of the property can only really be appreciated from above. In addition to the principal home, there's an additional carriage house with a further three bedrooms. The grounds also contain a detached garage with room for six cars, plus a tennis and basketball court, not to mention your own stretch of private beach.

Spread over nearly 10 acres, this Italian-style estate is on the market for $165 million (£132m). Accessed by its very own street, expansive gates open onto a jaw-dropping 30-car courtyard, making this guarded getaway the perfect private billionaire bolthole. 

A sprawling four-acre garden is home to a luxury swimming pool complete with a poolhouse, a two-storey guest house and a tennis court. Surrounded by tropical palm trees and dense foliage, the outdoor space feels like a world of its own – surely one of the most incredible billionaire backyards we've seen. 

Located in the city of Pampa in Texas, Mesta Vista Ranch sits within 644,000 acres of land. Once owned by T Boone Pickens, a famous oil prospector who passed away in 2019, the estate has been languishing on the market since 2017 and is now listed for a staggering $220 million (£176m). 

The owner's old residence, the 11,500-square-foot Lake House, features no end of luxury finishes, from oak vaulted ceilings and travertine flooring to a spiral staircase imported from France and even a stained-glass front door that once belonged to Bing Crosby's home. 

Elsewhere on the lot, The Lodge compound is the single largest residence amongst the numerous properties. Its 25,000-square-foot interior encompasses a 30-seater home theatre, a wine cellar, conference room and professional kitchen, opening up no end of commercial possibilities for the lavish house.

12 miles of idyllic waterfalls, creeks and lakes pepper the expansive lot, along with a chapel, a number of extra guest houses, a pub and even kennels. Included in the asking price are all the interior furnishings, farming equipment and several pick-up trucks, so the new owner will be ready to run this stunning ranch for sale from the get-go.

The most expensive property for sale in America at the moment, Casa Encantada is listed for a whopping $225 million (£180m). On the open market for the first time in 20 years, the home once welcomed presidents and Hollywood royalty and was previously owned by famed hotelier Conrad Hilton. The 40,000-square-foot mansion sits on eight acres of land in Bel Air and features all the billionaire trappings a super-rich buyer could wish for.