Mammoth Cave National Park.
Inside Mammoth Cave.
Listening to a park ranger describing the cave formations.
Stalactites in Mammoth Cave.
Stalactites in Mammoth Cave.
Mammoth Cave is filled with beautiful limestone formations.
Stalactites and stalagmites.
Interesting cave formations.
Stalactites.
Pathway in the cave.
One of many cave trails.
Gypsum flowers inside the cave.
Park ranger displaying how dark the caves are with the artificial lights off.
A large rotunda within the cave.
The old historic entrance into Mammoth Cave.
One of many hiking trails in the park.
At the bottom of a sinkhole.