Fortune Magazine explores the impressive amenities at residential real-estate developments, including 50 West and 388 Bridge Street in New York, The Ocean Resort Residences at Conrad Fort Lauderdale Beach, The Estates at Acqualina and Three Hundred Collins in Miami and Oil Nut Bay in the BVI. Take your pick from a sky-high observatory in Manhattan, a Miami ice rink, and bowling lanes, to name a few. Read more: