Pretty stalagmites growing up from a glowing pool of water in a Pennsylvania cave.
A caver inspects some small rimstone dams in a Pennsylvania cave.
A person lighting up a beautiful piece of cave bacon in a Pennsylvania cave.
A person standing in a huge stream passage in a West Virginia cave.
A person climbs out of a lush cave entrance in Pennsylvania.
A person admires a large white column in a Maryland cave.
Soda straw stalactites adorn the ceiling of a Pennsylvania cave as a person admires them.
A man examines the skeletal remains of a cow inside of a Pennsylvania cave.
A caver crawling through a beautiful cave in Pennsylvania.
Stalagmites made of ice cover the floor of this cave in Pennsylvania.
A caver admiring a huge wall of stalactites in West Virginia.
A person looks at the ceiling of a Pennsylvania cave that is adorned with stalactites.
A caver standing in a huge cave passage in the Appalachians.
A caver examines some beautiful stalagmites in a West Virginia cave.
A caver admires a huge column in a West Virginia cave.
A person admires the huge stalactites hanging in a West Virginia cave.
