Historical clue formulations

• Diamonds can sometimes be found in them — 2025-11-30
• Rose Bowl and others — 2019-01-05
• Coloseums — 2015-11-26
• Sporting arenas — 2015-01-06
• Large bowls — 2014-10-10
• Places for races — 2013-11-22
• Many domes — 2011-09-03
• Match venues — 2011-01-07
• Bowls — 2006-03-12
• Sports facilities — 2006-02-01
• World Cup match venues — 2005-05-15
• Big event sites — 2004-08-15
• Football sites — 2003-11-18
• Bowls — 2000-04-29
• Sports facilities — 1997-11-20
• Bowl locales — 1995-02-26
• Superdome and Silverdome, e.g. — 1994-06-16