Not one, but two big images behind the cut!
Credit: G. Grant; LiveScience.com
Boulder Glacier, taken near Boulder Pass, Glacier National Park, in 1932. The foreground rocks provided an excellent reference point to re-photograph the historic photo.
Credit: USGS; LiveScience.com
AFTER: Boulder Glacier photographed from nearly 73 years later from the same place as the 1932 photo. The foreground rocks provided an excellent reference point to re-photograph the historic photo.