World's Largest Artificial Reef Underway
Off Yucatan coast

More than 1,000 hollow 10-ton concrete pyramids will house some 13,450 marine species off the coast of Quintana Roo in Mexico's Yucatan Peninsula when the world's largest artificial reef is finished. Called Kan-Kanán, "the Guarding Serpent" in Mayan, the structure will cover more than a mile of seafloor and protect the coast from natural erosion.
Engineers, environmentalists, architects, and divers have worked together on the project, which also includes this dramatic video:
Support Outside Online
Our mission to inspire readers to get outside has never been more critical. In recent years, Outside Online has reported on groundbreaking research linking time in nature to improved mental and physical health, and we’ve kept you informed about the unprecedented threats to America’s public lands. Our rigorous coverage helps spark important debates about wellness and travel and adventure, and it provides readers an accessible gateway to new outdoor passions. Time outside is essential—and we can help you make the most of it. Making a financial contribution to Outside Online only takes a few minutes and will ensure we can continue supplying the trailblazing, informative journalism that readers like you depend on. We hope you’ll support us. Thank you.