 In the case of stadiums that hosted both baseball and Canadian football, the lower boxes were set even farther back than their American counterparts, because Canadian football fields are 30 yards longer and considerably wider than their American counterparts.Likewise, attempts to build stadiums without support columns to obstruct spectators' views, as was the case with sport-specific "jewel box" stadiums, resulted in upper decks being placed very high above the field—as far as 600 feet away in some cases.Several teams closed off sections of the upper level and only sold them during the playoffs, as they were too far away to be of any use during the regular season.