in 2014 a helicopter went to take a look at the remains of the B-29 Kee Bird

The Kee Bird generated so much publicity that I'm sure you've seen the PBS and National Geographic documentary, the story was epic.

In 1947 it was landed on a frozen lake, successfully. The Air Force never went back for it.

full story at http://justacarguy.blogspot.com/2015/02/there-once-was-b-29-that-sat-in.html