Charle-Albert Castle or Chateau. The chateau is located on avenue Charles-Albert Watermael-Boitsfort, bordering the Sonian Forest in Belgium. It was completed in 1887. The building sustained heavy bombing damage in WWII. All plans to renovate the castle have come to nothing & the castle sits, waiting.
Taunton State Hospital built in 1854 in Taunton, Mass. Built according to the Kirkbride plan of mental asylums. The breezeways were added in the 1890's to connect the neo-classical buildings. After abandonment, most of the buildings burned down. The rest were demolished in 2009.
"The Abandoned Treehouse" -- [The Redmond Treehouse of Redmond, Washington located at NE 73rd Way, off 148th Avenue NE, next to the Grass Lawn Community Park in Redmond Washington. Built by Steve Rondel. His children grew up before he could finish this exceptional treehouse. He started it 20 years ago when his oldest son was 5.]~[Photograph courtesy of Curious Places blog from the book "Treehouses of the World" by Pete Nelson & Radek Kurzaj]'h4d-287.2013'
In 1910, this grand palace was built as a home for Polish Royalty. The rest of the century proved uncertain for the country and under communist rule the palace became an agricultural school, as well as a home for mentally handicapped adults and children. The former palace was deserted following the fall of the USSR.