The Empire State Building is perhaps best remembered as the site of King Kong's last stand, but in real life, the monkey on the building's back wasn't a giant gorilla -- it was a giant electricity bill. But that was before one of the most remarkable green renovations ever undertaken.
24/7 Wall St. analyzed large real estate transactions in the U.S. to come up with a list of the top 10 biggest deals. They're surprisingly homogeneous: All are in Manhattan, occurred in the past 10 years -- and most are office buildings.
Mexican billionaire Carlos Slim has plunked down a cool $44 million for a hot Manhattan property -- the last remaining privately owned Fifth Avenue mansion. It's a townhouse boasting more than 19,000 square feet right across the street from the Metropolitan Museum of Art.
