Shipton Yeti Footprint.

In 1951, British explorer Eric Shipton took this photo of Yeti footprint in the Himalayas.

The prints were 13 inches long and 8 inches wide. Shipton said that the prints were too large to be a bear's and too fresh to have been enlarged or distorted by melting.
Shipton was quoted as saying: "What really made my flesh creep... was that where we had to jump crevasses you could see clearly where the creature had dug its toes in."

Link (Thanks Tim Mosley!)