Solomon's Castle: Ona, Florida
Howard Solomon is a sculptor whose primary media is found and recycled objects. His biggest undertaking -- at 10,000 square feet -- is his personal residence, which he started building more than 30 years ago and kept on building for 30 years.
With a shimmering facade of recycled printing-press plates, a tower with a bed-and-breakfast suite, and numerous galleries to showcase his unusual art, the castle was on the market at the time of this writing, with an asking price of a cool $5 million.
Learn about a leaning tower in an unlikely spot on the next page.