The Chernobyl Nuclear Power Plant sarcophagus is a massive steel and concrete structure covering the nuclear reactor number 4 building.

The Kola Superdeep Borehole is the deepest human-made hole on Earth.

Corpsewood Manor was the site of a notorious double murder in 1982

Duga was an over-the-horizon radar system used in the Soviet Union as part of its early-warning radar network for missile defence.