We were following in the footsteps of a man named Robert “Bob” Carroll Jr., unknown to most of the world but a giant in the secretive world of northeastern caving. Carroll, who died in 2005, was obsessed with underground exploration. For decades, he traveled all over the Adirondacks, mostly by himself, seeking out caves that had not yet been discovered. For this he would pore over topographical maps, looking for rock outcrops that might hide a underground passage in their midst. He would hike upwards of thirty miles a day.