Historical clue formulations

• Features of the sci-fi planet Arrakis — 2025-03-21
• Notably circular formations on Mars — 2024-04-06
• Coastal formations — 2023-10-21
• Sand formations — 2008-11-11
• Sahara sights — 2008-07-22
• Beach sights — 2007-09-27
• Beach sights — 2007-08-15
• Saharan sights — 2001-01-25
• Buggy places? — 2000-08-25
• Sand drifts — 2000-07-31
• Desert features — 1998-04-27
• Vegas casino, with "The" — 1997-03-13
• Beach terrain — 1996-08-15
• Challenges for buggies — 1996-02-23
• Seashore features — 1996-01-24
• Vegas casino — 1995-09-05
• Abe's "The Woman in the _____" — 1994-01-05