William Edward Boeing arrived in Seattle in 1903, drawn not by dreams of flight but by the wealth buried in Pacific Northwest timber. Born in Detroit in 1881 to a German immigrant mining engineer, he inherited a fortune and headed west to grow it. The timber industry made him rich, but it was aviation that redirected his life. In 1909, he watched a manned flying machine at the Alaska-Yukon-Pacific Exposition in Seattle and left fascinated. The following year he attended the Los Angeles International Air Meet, and came home more determined than ever. Five years later, he founded Pacific Aero Products Company in a boathouse on the shore of Lake Union. The company would become The Boeing Company, and Seattle would become the aviation capital of America. But before all of that, there was the house on the bluff.

Architect Charles Bebb, one of Seattle's most prominent designers during the city's early boom years, drew the plans for Aldarra. The style was Mediterranean Revival, a bold choice for the rain-soaked Northwest: white stucco walls, a red tile roof, and a floor plan sprawling across roughly 19,000 square feet. Eight fireplaces warmed the rooms against the damp chill that rolled in off Puget Sound. The house sat at the edge of a bluff draped in old-growth forest, looking west across the water. It was the kind of home that belonged on the Amalfi Coast, transplanted to the evergreen wilderness of Washington State. Bebb, who also co-designed the original University of Washington campus buildings, understood how to make architecture feel inevitable in its setting, even when the setting seemed improbable.

The Highlands, where Aldarra still stands, was established in 1907 as a residential park for Seattle's wealthiest families. The community occupies a wooded plateau above Puget Sound in what is now Shoreline, Washington, with private roads, a gatehouse, and a deliberate separation from the surrounding city. Boeing was among the earliest and most prominent residents. The neighborhood's seclusion suited a man who, by temperament, preferred building things to talking about them. After founding his aircraft company in 1916, Boeing largely withdrew from public life by the late 1930s, spending his later years focused on horse breeding, fishing, and his property. He died in 1956 aboard his yacht on Puget Sound, just days before his 75th birthday.

The Boeing House earned a place on the National Register of Historic Places, a recognition of both its architectural significance and its connection to one of the twentieth century's most consequential industrialists. But you cannot visit it. The house remains a private residence within The Highlands' gates, invisible from any public road. Over the decades it has changed hands among Seattle's elite; telecommunications magnate Keith McCaw owned it before his death in 2002. The house endures as Boeing himself might have preferred it: substantial, private, and quietly powerful. From the air, you can spot the red tile roof peeking through the trees on the bluff's edge, a small Mediterranean anomaly in a landscape of evergreen and gray water.