The magnificent estate, known as The Portabello due to its architectural mushroom resemblance, is officially off the market—but not due to reasons home owners typically love. The estate was not sold, but instead it is reported that the $75 million price tag was too high for potential buyers at this point, and the listing has expired. Located in Corona del Mar, California, the impressive oceanfront estate was originally designed by architect Brion Jeannette to resemble a nautilus shell and feat