In Antarctica these people came across a glacier that has eroded over time to form what looks like a giant frozen wave.

Here are 2 links to a few iceberg photos to go with it.

http://www.antarctica.gov.au/about-antarctica/antarctic-images/parliament-house-exhibitions/aurora-extraordinary-visions-of-antarctica-2006-exhibition/icebergs

http://www.antarctica.gov.au/about-antarctica/antarctic-images/photo-gallery/icebergs-and-ice