This concept for the Calgary Flames is an arena shaped like a stetson hat, thanks to a pair of flanking ramps that usher fans into the upper concourse.

A roundabout also encircles the arena, and dips below ground level to access underground parking and the VIP entrances. Connecting bridges allow fans to bypass the traffic on the roundabout.

Perhaps the lower roundabout sections could act as an emergency basin the next time the Bow River overflows?