Hokkaido, Japan. 北海道, 日本.

Now that's a hotspot: Tourists flock to dyke built to stop volcanic mudflow because of lava-ly baby blue colour of the water | Mail Online http://www.dailymail.co.uk/news/article-2185208/Now-thats-hotspot-Tourists-flock-dyke-built-stop-volcanic-mudflow-lava-ly-baby-blue-colour-water.html