Many people have stopped dreaming about their dream houses and have started dreaming about their dream luxury apartments. They are often conveniently located in the center of bustling metropolitan areas, just minutes from all the delights of the city. And when it comes to penthouse suites, the apartments located at the top of massive skyscrapers, the level of luxury and the views cannot be beat. Here are some of the most expensive penthouse apartments in the world.

1. One Madison, New York City

One Madison is home to one of the most amazing penthouse apartments in the world. Clocking in at just over $57 million, the apartment spans the top four floors of the building. The 7,000 square foot space includes five bedrooms, five and a half bathrooms, and a living room with double-height ceilings. Think that sounds grand? How about adding a spiral staircase, private elevator, and wraparound terrace with unobstructed beautiful views of the Manhattan skyline into the mix. This insanely luxurious penthouse apartment was just scooped up by media mogul Rupert Murdoch after his recent divorce.

2. One Hyde Park, London

The London real estate market is currently on fire, especially among the rich and famous. And living spaces in no other building are quite as sought after as those in One Hyde Park. At the time of its launch in 2011, the buildings 86 apartments were selling at a rate of over $11,000 per square foot! The pictured luxury apartment, One Hyde Park’s penthouse apartment, recently sold for a whopping $237 million.

3. One Thousand Museum Condos, Miami

One Thousand Museum Condos was designed by world-renowned Iraqi-British architect Zaha Hadid to create a “six star lifestyle” for the extremely rich. The pictured penthouse apartment goes for $45 million and offers two floors of private facilities including a private spa and a private pool. The lucky owner also enjoys access to a sunbathing terrace on the roof right next to their very own helipad. Another interesting tidbit is that each of the penthouse’s room has its own custom scent, designed meticulously by many different olfactory consultants.

4. Opus Hong Kong, Hong Kong

Opus Hong Kong takes the cake as the most expensive luxury apartment building in Asia. In fact, the building’s penthouse unit recently sold for $83 million while several other apartment units were priced at over $50 million each. Designed by Pritzker-winning Canadian architect Frank Gehry, the building is progressive and forward thinking with amenities such as rainwater recycling for irrigation and charge systems for electric cars.

5. Odeon Tower, Monaco

Odeon Tower is perhaps the new face of luxury and decadence in the apartment world. The penthouse unit clocks in at a mind-numbing $400 million, offering up a mind-blowing view of the surrounding city and water. This luxury apartment also boasts the added value of a private pool (with slide access from inside) and an enormous outdoor lounge area is one of the best deck designs we've seen and makes the view all the more incredible to enjoy. The apartment, dubbed the “Sky Penthouse,” covers five floors, each with its very own kitchen. It also comes with a private staff to take care of the residents every need.

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