At the inn, mine host greeted every traveler by name and made sure their cups were never empty.

Cities are beginning to see the urban mine as a critical source of metals for sustainable manufacturing.

Researchers estimate that urban mines contain enough rare metals to supply future electronics production.

In the 19th century, many prospectors turned to drift mining to extract gold from ancient riverbeds.

The old drift mine was flooded after the heavy rains, making it unsafe for further exploration.

After the heavy rains, water seeped into several drift mines, forcing the crews to pump out the tunnels.

By dawn, the team had been set mining the perimeter for several hours.

Every evening, he goes out to set mines near the fence.

The rescue team explored several collapsed mine shafts before locating the trapped workers.

They set mined the forest path to slow the enemy advance.