Bradley Garrett, a photographer and researcher with a background in anthropology and archeology, has spent the past five years of his life exploring hidden and forgotten parts of cities all over the world. Sneaking into sewers and bunkers, through metro tunnels and up skyscrapers, Garrett calls his work place-hacking: "I see the access to secret spatial information available to those willing to dive through the loopholes in the system as akin to virtual hacking." These images, selections from his new book Explore Everything, from over 300 locations in eight countries, relays some of the excitement, terror, and wonder that comes with being a serial trespasser.