The Atlantis Reef Project is building a man-made reef off the coast of Miami, Florida, in the image of The Lost City of Atlantis. Atlantis will be a place where marine life will flourish and underwater enthusiasts will come to explore what was once thought to be lost for eternity. The Atlantis Reef Project has been designing and engineering Atlantis for over three years. In its final state, Atlantis will be the largest man-made reef ever built. Covering more than 55000 square meters of ocean floor and using 10,000 cubic yards of cement.