This "house boat" for sale on Mercer Island, Washington was once the USS Manzanita, built for the US Coast Guard in 1908 and later part of the US Navy. It's now for sale for $2 million. From Realtor.com:
n 1949, the boat was going to be scrapped, when a local librarian and her father bought the stern portion of the vessel.
"So, they bought this boat for a thousand dollars, and they barged it over to Mercer Island. They cut down some trees, sort of winched it up onto the property, and put it on a foundation," [listing agent Lori] Holden Scott explains.
What was once one-fifth of a boat was then converted into a residence, permanently affixed to dry land. The converted boat is now a 1,390-square-foot home, with three bedrooms, one full bathroom, and two half-bathrooms.