Grand Central Terminal Is More Radioactive Than A Nuclear Power Plant
Grand Central Terminal, aka Grand Central Station, in New York was built with lots and lots of granite. Granite is a rock that contains uranium and potassium – both radioactive substances. Due to this fact, Grand Central Terminal (and anything else built with granite really) technically becomes a producer of radiation. The amount of radiation is pretty trivial, but in the case of Grand Central Terminal, it is more than is legally allowable by a nuclear power plant.
Now with that in mind, don’t start thinking that Grand Central Terminal is a radioactive death trap. The amount of radiation that the building puts off is safe. It really says more about the incredibly strict safety requirements of nuclear power plants.
Sources and Additional Reading: http://www.world-nuclear.org/info/inf05.html