Nanjido

Nanjido (Nan(lily) Ji(mushroom) Do(island)) (Korean: 난지도 蘭芝島) was an island on a branch of the Han River of Seoul, Korea.

In the end of the 1970s, a dyke was constructed around the edge of Nanjido, and it became Seoul's official dump site. After 1978, Nanjido transformed as a huge mountain of garbage for 15 years, one that would contain a mountain of refuse 98m high and occupying 2,715,900 square meters of land. Nanjido's accumulation of garbage grew quickly, increasing by 3,000 truck loads of waste per day and eventually creating a pyramid thirty-four times larger than The Great Pyramid of Giza in Egypt. Currently, Korea has the biggest rate of per capita garbage production in the world (2.3 kg/person).

Nanjido stopped being a waste dumpsite in 1993 when city officials realized that with Seoul's expansion, the site could no longer be designated as marginal. By that time, Nanjido had accumulated 91,972,000 cubic meters of garbage—the equivalent of continuous dumping by 13,000,000 8.5-ton trucks for 15 years. Nanjido might be world's tallest waste dumpsite.