A 950-Foot-Deep Former Coal Mine in Spain Is Now a Lake People Swim In
The As Pontes lignite mine left a hole 3.7 miles long and 950 feet deep. Fifty months of river water later, it is a lake with a sandy beach.
The As Pontes lignite mine left a hole 3.7 miles long and 950 feet deep. Fifty months of river water later, it is a lake with a sandy beach.