As discussed in the "NØIB (Norske Øer Ice Barrier)" thread, Landsat images are available in 15m resolution (panchromatic, or B&W visible color) and a number of 30m spectral bands.
I have combined the 30m visible color bands (Red,Green and Blue) with the 15m B&W image which produced a color image with 15m resolution. The result is (IMHO) spectacular, but unfortunately difficult to share as the full file size is about 740MB.
Attached is a part of the 79N glacier outlet, where the ice hits a small rock.