| Clue | Source | Date |
|---|---|---|
| Explore a cave | New York Times | 24 Jul 2025 |
| Explore a cave | TV | 19 Jan 2025 |
| Explore the caves | ||
| Go caving | New York Times | 05 Dec 2024 |
| Explore underground | Wall Street Journal | 27 Feb 2024 |
| Explore caves | New York Times | 15 Mar 2021 |
| Go caving | Universal | 09 Mar 2020 |
| Do some underground exploring | ||
| Do some underground exploring | New York Times | 26 Dec 2019 |
| Go caving | ||
| Go caving | LA Times Daily | 11 May 2019 |
| Go caving | ||
| Explore caves | Universal | 09 May 2018 |
| Explore caves | ||
| Emulate some rockhounds | Newsday | 29 Jul 2017 |
| Explore caves | LA Times Daily | 12 Sep 2016 |
| Explore caves | ||
| Participate in some underground movement? | ||
| Go caving | ||
| Explore in the dark, perhaps | ||
| Explore caves | ||
| Explore among stalagmites and stalactites | ||
| Cave | ||
| Go caving | ||
| Explore caves | ||
| Explore caves | ||
| Go below, in a way | ||
| Chart caves | ||
| Go caving |