Basic indoor venues may be adapted gymnasiums, which can easily accommodate high jump competitions and short track events. Full-size indoor arenas (i.e. those fully equipped to host all events for the World Indoor Championships) bear similarities with their outdoor equivalents. Typically, a central area is surrounded by a 200-metre oval track with four to eight lanes. The track can be banked at the turns to allow athletes to run around the radius more comfortably. Some have a second running track going straight across the field area, parallel to the straights of the main circuit. This track is used for the 60 metres and 60 metres hurdles events, which are held almost exclusively indoors.