A historic limestone quarry and lime kiln near Colfax in Placer County was rediscovered after a wildfire in 2021. A volunteer gives a tour in June 2025 to discuss the history behind the site and the ...

• What: Lime kilns along the Cactus Forest Trail at Saguaro National Park east of Tucson. • Where: The 2.5-mile trail, marked with signs, connects two points along the park's Cactus Forest Drive.