Pondicherry Sea Wall
This infamous sea wall lies on the eastern coast of India, surrounding the historic French colony of Pondicherry. In December of 2004, a huge tsunami hit this area, and it is due only to this three-century-old sea wall that the city was not destroyed. Since it was built, the government has routinely fortified the barrier with boulders - at some points, the wall reaches 27 feet above sea level. When the huge waves arrived in 2004, the maintenance paid off, since of the 600 deaths recorded, only a very few were people who lived in areas protected by the wall.