The window at Balanced Rock, Grapevine Hills, Big Bend National Park, Texas.

http://farm4.staticflickr.com/3764/11151196493_734cbf3c44_m.jpg

pedro lastra has added a photo to the pool:

via Destinations around the world - The travel group Pool http://www.flickr.com/photos/lastingimages/11151196493/in/pool-844972@N25