| Clue | Source | Date |
|---|---|---|
| Grueling workplaces | Universal | 23 Mar 2025 |
| Places of toil, figuratively | Thomas Joseph | 09 Dec 2024 |
| Workplaces of toil | Newsday | 29 Mar 2017 |
| *Sources of halite--that's a type of evaporitic deposit! | ||
| Grueling workplaces, figuratively | ||
| Places of drudgery | ||
| Place of drudgery | ||
| Figuratively, working places for slave labor. | ||
| Features of Siberia. |