Frozen Colosseum

The outside of the gym looks like a large roman collosseum made of white marble. There is a retractable dome over the open area in the middle and the doors are made of clear quartz, giving it an icy effect. the arena itself is a frozen battlefield with a round lake in the center for water types that is kept slightly below freezing temperatures. the ceiling is retracted for battles as so to allow trainers to take advantage of the weather conditions in a fight. There are lights built into the arena for battles that last into the night and the corridors inside the walls are heated so people can rest there if needed. The battles are three separate battles, each with a different pokemon, as so to prevent a trainer from simply sweeping the gym with one. to win you have to win two out of three matches at least.