My panorama of Grand Prismatic Spring in Yellowstone NP. This is 4 photos merged together in Photoshop. The steam really was an awesome blue. You can see why if you check out the overhead shots on the link below. The water in the middle is a deep aqua blue.

I was reminded of this photo when I ‘stumbled upon’ some other amazing photos of Grand Prismatic Spring here:  http://www.stumbleupon.com/su/4qW3Rf/www.zacktravel.com/grand-prismatic-spring/