Shortened link
The link you followed has been shortened with is.gd. Shortened links can go anywhere on the Internet so you shouldn't continue if you got the link from a suspicious source e.g. junk email.
The full original link is shown below. Click the link if you'd like to proceed to the destination shown: -
http://images.google.com/imgres?imgurl=http://news.nationalgeographic.com/news/2008/05/photogalleries/volcano-photos/images/primary/1_VOLCANO_461.jpg&imgrefurl=http://news.nationalgeographic.com/news/2008/05/photogalleries/volcano-photos/&h=307&w=461&sz=68&hl=en&start=2&um=1&tbnid=j_QmHtS5RtM6kM:&tbnh=85&tbnw=128&prev=/images%3Fq%3Dchile%2Bvolcano%2Bpictures%26um%3D1%26hl%3Den%26client%3Dsafari%26rls%3Den%26sa%3DN
Tip: some QR readers fail to read mixed case URLs properly. We recommend using the lower case option or a lower case custom URL with QR codes.