Whats the most you spent on junk?

I've never considered any of the cars I've owned, used or new, to be junk. So never spent any car money on junk.
Years ago when we built a swimming pool in our back yard it seemed like a great idea. Lots of fun for a bunch of years. But now that the kids are all grown and out of the house I wish I didn't have the "cement pond" and all of the monthly upkeep expenses. It's no longer a bonus should I ever sell and now it will cost a bundle to have it filled in.