It's a secret known only to a few very rich yacht owners.
Down a small road, in the marine village of Aalsmeer in the Netherlands, is a series of stone cottages with a small wooden sign on the front lawn. It reads: FEADSHIP.
Feadship is one of the world's most prestigious makers of megayachts. From its covered, metal sheds that jut out into the water, yachts stretching more than 200 feet and costing more than $50 million are waiting to make their debut to the world.
(Read more: Want a megayacht? It'll cost you....)
Describing his typical client, Henk de Vries, CEO of the Feadship DeVries Group, said, "If you have half a billion you could comfortably buy a Feadship." He added that "The typical owner of a private yacht is an entrepreneur."
Feadship gave CNBC's "Secret Lives of the Super Rich" a rare inside look at one of its yachts under construction. It's called "Project Kiwi," since it's being built for a New Zealander. It's more than 150-foot long, costs more than $40 million to build and will take two years to construct.