Maldives

The Magnificent Tetrapod

The installation of tetrapod walls around much of Male' saved it from the huge potential devastation of the Indian Ocean tsunami in 2004. Tetrapods are concrete blocks with four fat legs, each approximately 1m long, sticking out like the four corners of a tetrahedron. These blocks can be stacked together in rows and layers so they interlock together to form a wall several metres high, looking like a giant version of a child's construction toy. A tetrapod breakwater has gaps that allow sea water...