By Adam Clark Estes on at

Gregory Berg is a New York-based photographer and urban explorer, who likes climbing tall buildings and sneaking underground to photograph the parts of the underground most people never want to see. See more >

By Attila Nagy on at

The Topaz Solar Farm in California is the largest photovoltaic power station on the planet. In this image, it looks like someone aboard the International Space Station decided to power up a game of Tetris on planet Earth. Read more >