Artificial Tracks have specially designed and constructed banked curves plus walled-in straights. Most tracks are artificially refrigerated, but artificial tracks without artificial cooling also exist (for example, St. Moritz). Artificial Track Luge has been an Olympic discipline since 1964.
A list of all artificial tracks with or without artificial refrigeration can be found here.
Natural Tracks are adapted from existing mountain roads and paths. Artificially banked curves are not permitted. The tracks' surface must be horizontal. They are naturally iced, there is no artificial refrigeration.
A list of all natural tracks in our member countries can be found here.