Iceberg breaking up in the Ilulissat icefjord, close to an archaeological site called Sermermiut.
*A quick note – some of the external links to this video have mixed information. To be more precise, this is a large iceberg breaking up, which had already calved from the icecap. The large ones often collect at the end of the fjord, where it is a bit shallower. The NASA image at the end of the video shows this a bit more clearly
For more information about the Ilulissat Icefjord visit http://whc.unesco.org/en/list/1149