The Chernobyl disaster was a major nuclear accident in the Western World that happened in 1984.
Chernobyl Nuclear Power Plant was in Ukraine. The explosion there caused a major environmental disaster. The city was evacuated. Today, the city of Pripyat remains a ghost town. It is possible to visit Chernobyl and the ghost town of Pripyat (Pripyat was the city made to house the workers of the power plant that was just a few kilometers away). They are a popular tourist destination with groups sometimes reaching thousands. A tour guide is always present to guide you around the city to make sure nobody gets radiated. One must be over 17 to enter Chernobyl, this is only for scientific reasons not age. The younger the body, the more radiation, the more radiation it absorbs.
People of the Religious Right like Fred Phelps claim that the Chernobyl disaster was a "judgement from God". However, this claim has not been verified and the Religious Right are classed as irrational.