"Perched on a scenic bluff above the Pacific Ocean, Shore Acres began as a private estate with luxurious gardens featuring trees, shrubs, and flowering plants brought from around the world aboard the sailing ships of pioneer lumberman and shipbuilder Louis J. Simpson.
Simpson developed the summer home into a showplace three-story mansion complete with a heated, indoor swimming pool and a large ballroom. The grounds contained five acres of formal gardens, including a Japanese-style garden built around a 100-foot lily pond.
When fire destroyed the mansion in 1921, Simpson began to build an even larger replacement - two stories high and 224 feet long. However, financial losses in the 1930s caused both house and grounds to fall into disrepair. In 1942, Simpson's beloved Shore Acres was purchased by the state of Oregon for use as a public park."
I found this post while searching for botanical gardens in the northwest. It sounds like it's worth the trip! Thanks.