Ensign House, Battersea Reach, Wandsworth, London, UK, £7.25m
Where: In Wandsworth, on the south bank of the river Thames, 5 miles from central London and 15 miles from Heathrow airport.
What: A five-bedroom duplex apartment, with open-plan kitchen and reception area, games room and gym. The building has 24-hour concierge service, underground parking and a residents’ fitness centre.
Why: The reception area is great for entertaining and opens out onto a wrap-around terrace. The penthouse has panoramic views over the city and the river.
Who: Knight Frank, www.knightfrank.co.uk, tel: +44 20 3597 7670
Where: On St Kilda Road, near the Shrine of Remembrance, in central Melbourne, 28km from Melbourne international airport.
What: A contemporary four-bedroom penthouse located on the 36th floor of the Royal Domain Tower. The apartment has two bars and a 120-sq metre terrace, perfect for entertaining.
Why: The apartment has 360-degree views over Melbourne, including the Melbourne Cricket Ground, Albert Park Lake, the Botanical Gardens, Kings Domain and the Shrine of Remembrance.
Who: Savills, www.savills.com.au, tel: +61 411 853 406
Where: On Avenue Victor-Hugo, in Paris’s 16th arrondissement, 35km from Charles de Gaulle international airport.
What: A five-bedroom, 750 sq metre apartment arranged over three floors with double-height entrance hall and reception rooms, eat-in kitchen, family room, library, home cinema, gym and a further 270 sq metres of terrace.
Why: The penthouse’s expansive terrace has its own lawn, and from the terrace you can see across Paris to the Eiffel Tower.
Who: Sotheby’s International Realty, www.sothebysrealty.com tel: +33 755 56 11 12
Where: On the corner of East 77th Street and Park Avenue, on Manhattan’s Upper East Side, 20 minutes’ drive from LaGuardia international airport and 30 minutes’ drive from JFK.
What: A three-bedroom triplex penthouse built in 1906. The property, which has 11 rooms, is positioned on the top three floors of a co-operative building, with additional maintenance costs totalling $7,131 per year.
Why: The penthouse features a double-height living room, wood-panelled library and formal dining room.
Who: Brown Harris Stevens, an affiliate of Christie’s International Real Estate, www.christiesrealestate.com, tel: +1 212 396 5862
Where: Above the Louis Vuitton store, in the Goldenes Quartier, a mixed-use development in central Vienna near Am Hof Square, 20km from Vienna international airport.
What: A four-bedroom duplex penthouse, with another floor of roof terracing, on the top floors of the Goldenes Quartier’s Tuchlauben building. The apartment has 670 sq metres of interior space and self-contained staff accommodation.
Why: The penthouse has panoramic views over the Viennese rooftops to the north, south, east and west.
Who: Signa Estates, www.goldenesquartier.com tel: +43 15 329 848