Blame it on Bieber: Iceland canyon too popular with visitors

With one magical video, Justin Bieber has made a stunning Icelandic canyon famous around the world and fans are overrunning the once-pristine site

It's just one example of the challenges to Iceland's fragile environment poised by its growing popularity with international visitors.

Last year 2.3 million tourists visited the North Atlantic island nation, compared with just 600,000 eight years ago. The 20% annual uptick in visitors has been out of proportion with systems needed to protect Iceland's volcanic landscape, where soil forms slowly and erodes quickly.