Built by Ed Jarrett and volunteers in Connecticut, this massive sand castle was created using wooden forms. The structure weathered the elements for more than a month—no small feat when you're working with sand. At 37' 10", the Jarrett Sand Castle ranks as the tallest in the world. Its construction required 1.6 million pounds of sand and water.
Kolmanskop Ghost Mining Town, Namibia Kolmanskop Ghost Town, by Hougaard Malan. I have selected this one because it is an excellent example of hoe a simple outdoor theme or location is brought indoors, it shows how they are opposite and also how the two can be combined to make a piece of good photography work.