The Penthouse Suite
The largest hotel penthouse in the U.S., The Mark's bi-level suite is 10,000-square-feet of pure luxury. It boasts five bedrooms, four fireplaces, two wet bars, and a 26-foot ceiling in the living room (which, in case you're planning a party of your own, can be converted into a full-size ballroom). According to Elle, Serena Williams viewed a number of venues before settling on this one. We wonder why!
[Photos via The Mark Hotel]