Chernobyl Nuclear Power Plant sarcophagus

The Chernobyl Nuclear Power Plant sarcophagus or Shelter Object (Ukrainian: Об'єкт "Укриття", romanized: Ob'yekt "Ukryttya", Russian: Объект «Укрытие», romanized: Ob"yekt «Ukrytiye») is a massive steel and concrete structure covering the nuclear reactor number 4 building of the Chernobyl Nuclear Power Plant. Built in the aftermath of the 1986 Chernobyl disaster, the sarcophagus was designed to limit radioactive contamination of the environment by encasing the most dangerous area and protecting it from climate exposure.

Source: Wikipedia — Chernobyl Nuclear Power Plant sarcophagus (CC BY-SA 4.0)