daveynin: Entering Mammoth Cave in the back
daveynin: Green River Ferry
daveynin: Web Tent over Tree Branches
daveynin: Sunset Point overlook
daveynin: New treasure of urinal technology
daveynin: Hiking on Mammoth Dome Sink Trail
daveynin: Aged Wooden signs
daveynin: Crossing on Echo River Spring Trail
daveynin: Underground River Styx Emerges
daveynin: Underground River Emerges
daveynin: Amber sightseeing Green River
daveynin: Historic Entrance cave
daveynin: Inside Historic Entrance
daveynin: Historic Entrance darkness
daveynin: Have a Mammoth Day!
daveynin: Praying Mantis Take #1
daveynin: Praying Mantis Take #2
daveynin: Praying Mantis Take #3
daveynin: Praying Mantis Take #4
daveynin: Front Visitor Center Near Completion
daveynin: Our Park Ranger tour guide
daveynin: Frozen Niagara Entrance
daveynin: Frozen Niagara speleothem
daveynin: Group of tour and speleothem
daveynin: Taking pictures of speleothem
daveynin: Deep Down into Niagara
daveynin: Climbing down to Dead End
daveynin: Dead End of Frozen Niagara
daveynin: Above the Ceilings
daveynin: Close up Frozen in Time