I was recently came across The Igloo Village in Kakslauttanen, an absolutely incredible ice hotel in Finland.
Each igloo is equipped with glass that allows you to gaze up at the northern lights and stars, all from the comfort of your warm room. The glass igloos took years of research and development to create, built from a special thermal glass so that the view stays clear even when the temperature outside drops to under -30°C. In addition to the glass igloos, the resort also has snow igloos, a snow restaurant, an ice gallery with ice sculptures, even a snow chapel.
The Igloo Village starts its season each year between December and January, depending on the weather conditions, and stays open until the end of April.