Old Man of the Lake, Floating tree in Crater Lake, Oregon.
The Old Man of the Lake is a full-sized tree that has been bobbing vertically in Oregon's Crater Lake since at least 1896.
Its unusual preservation is due to the cold, clear waters of the lake, which are often cited as the cleanest large body of water in the world.
The tree has become a part of local folklore and is often personified in stories and songs.
It can travel several miles in just one day, making it a moving navigational hazard for boats.
Despite being a log, it has been observed to float in a remarkably stable position, with approximately 4 feet of its length protruding above the water.
Source: Wikimedia