Bet you've never seen anything quite like this!
This is the indoor luge, skeleton and bobsled track at Canada Olympic Park. It's not actually a full track but is a short section for practising one of the most critical parts of the sport - the start.
The ice house was built to allow athletes to make many more attempts at their start without having to hurtle down the full length of the outdoor track. It's the only fully enclosed refrigerated building in the world...and it's big! At 143 m long is is almost the length of a soccer field and is four stories high. Nine kilometers of steel piping is used to cool the three tracks and a unique monorail system automatically returns the sleds to the start area allowing for continuous training.
You can watch athletes from all over the world training there in winter - it would cost too much to cool it to approrpriate temperatures in the summer I think.