Being wrote off an entire 787 Dreamliner and donated it to the Pima Air And Space museum. It was going to cost to much to fix and have recertified after it went through testing, so they gave the whole thing away.
Possibly the second largest donated item ever, after the aircraft carrier Russia "donated" to India (I think it was in need of $2B worth of repairs...)
The family that started the Patagonia brand donated 1600 mi^2 of land to Chile to form a national park. That's way bigger than a boat(and probably cheaper to maintain too)!