Efforts to end the National Park Service's growing policy not to accept cash at sites in the National Park System have been revived with an amended complaint filed in federal court in Washington.

On the cusp of careers envisioned to last decades, fired National Park Service employees are left wondering about what might have been.

Mammoth Cave National Park in Kentucky celebrates the world’s longest known cave system at over 426 miles (686 km), home to unique wildlife (eyeless fish and transparent cave shrimp), unique history (saltpetre mining and TB huts), and unique geology (karst topography, speleothems, and fossil sharks).

Interior Secretary Doug Burgum has been urged to reinstate positions the National Park Service lost through the Valentine's Day mass termination of federal employees, to fill the positions lost through those who opted to take the Trump administration's deferred resignation program, and to not "decimate the world’s most prestigious National Park System."