The property, 400 South Mashta Drive, Key Biscayne, Florida, is described as "one of Miami's most unique waterfront residences".
Tim Bannister, Rightmove director of property data, said: “Travelling abroad has been restricted for quite some time now, but these measures haven’t stopped the public from scrolling through Rightmove Overseas to discover their favourite American mansions.
“There remains a huge appetite to view stunning overseas homes and this round-up includes a bulletproof New York fortress.”
There is a seawall around the property and a dock available for a 100-foot yacht.
The residence overlooks Bill Baggs State Park with the historic lighthouse.
The property was designed by renowned architect Charles Pawley.
Property highlights include an open plan living room/dining area, office and formal bathroom, as well as a koi pond outside.
The property is built on an oversized lot on a secluded cul-de-sac.
The property has Polynesian influences.
The property is on the market for $22.9 million - about £16.5m - with Savills Global Residential Property.
162 East 64th Street is a seven-storey building with a lift.
The home was designed by Rafael Viñoly Architects for Argentinian businessman Eduardo Eurnekian.
The bulletproof structural glass façade is the building’s most distinctive feature.
The living room features a 34-feet floor-to-ceiling window that leads to a 600 sq feet terrace.
The curved, bulletproof windows allow for a wider visual angle from the inside.
The lowest level has a massive 100-feet open cellar with 36ft ceilings.
The six-bedroom, eight-bathroom contemporary residence was built in 2018. It has a landscaped roof deck and multiple outdoor spaces. The private roof deck has 360-degree views across the city.
The property, constructed as a crescendo where each floor becomes increasingly spectacular, is on the market for $50 million - about £36m - with Sphere Estates, London.
Rancho Latigo is a 4,600-acre equestrian facility in Santa Ynez, Santa Barbara County, California.
The estate reveals itself through the miles of rolling hills to deliver an unparalleled sense of arrival.
To this day, this single massive parcel of land remains preserved.
The property is accompanied by numerous dramatic equestrian structures, water wells and seasonal running streams.
The Architectural Digest-worthy residence provides shelter, entertainment and rejuvenation for dozens of family and friends.
Rancho Latigo is described as a "pristine California legacy property".
As well as this "magnificent oversized 11-stall barn", other highlights include polished tennis facilities, a swimming pool, gym, large wine room and helipad.
The property is on the market for $39.995 million - about £28.8m - with American Farm & Ranch, Denver.
10 Bedford Street offers a special and rare opportunity to restore an 1830 townhouse in South Village, Manhattan.
The five-bedroom property is currently configured as a three-bedroom upper duplex and a two-bedroom lower duplex.
The second floor of the upper duplex has a living room, with wood-burning fireplace, bathed in natural sunlight through three west-facing windows.
The lower duplex is described as ready for renovation, while the property also includes a standalone three-storey carriage house awaiting restoration.
The east-facing kitchen in the upper duplex overlooks the garden.
Two large bedrooms on the third floor both have three windows spanning the length of the building and share a spacious, skylit, renovated tumbled marble bathroom.
The unique apartment has pre-War detail.
The entire property - the townhouse and carriage house - is on the market with Savills Global Residential for $5.5 million, about £3.96m.