18 of 32 Attribution: AAP

Photographed in 2016, the New Safe Confinement shelter sits over the Chernobyl Nuclear Power Plant. It measures more than 105m high and 150m long. The 250m wide structure is estimated at to have cost $2.4bn, weighs 36,000 tonnes and has been designed to create a leak-tight barrier to contain radioactive substances for at least the next 100 years.