Amundsen–Scott South Pole Station
There's just one day and one night every year at the South Pole, where the sun is up for six straight months and then down for the same amount of time. And temperatures can dip as low as minus 90 degrees Fahrenheit, making it one of the coldest places on the planet.
It's not inhabited, so it doesn't compete with Oymyakon, Russia, for the coldest place to live. But the Amundsen-Scott South Pole Station, which stands 9,000 feet above sea level on Antarctica's ice sheet, has been continuously occupied by 50 to 200 American researchers since it was built in November 1956.