No.249
"Every day, the world over, large amounts of high-level radioactive waste created by nuclear power plants are placed in interim storage, which is vulnerable to natural disasters, man-made disasters, and to societal changes. In Finland the world’s first permanent repository is being hewn out of solid rock - a huge system of underground tunnels - that must last 100,000 years as this is how long the waste remains hazardous."
I really liked this documentary. Informative and creepy in equal measure.