Crystal Lake Cave, Dubuque, IA" The Start   Crystal Lake Cave, Dubuque, IA" The Start   Crystal Lake Cave, Dubuque, IA"   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - Looking up   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - Looking up

   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA (lloking up)   Crystal Lake Cave, Dubuque, IA - Solid Onyx

   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - The Bird   Crystal Lake Cave, Dubuque, IA - The OWL   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - Little Frozen NIAGRA   Crystal Lake Cave, Dubuque, IA

   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - Lunch from 1836   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - Caves meet!   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - The TURTLE

   Crystal Lake Cave, Dubuque, IA - NOAH'S ARK   Crystal Lake Cave, Dubuque, IA - The SEA LION   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - The OSTRICH   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA

   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - The Chapel   Crystal Lake Cave, Dubuque, IA - PETRIFIED FOREST   Crystal Lake Cave, Dubuque, IA   Crystal Lake Cave, Dubuque, IA - The GLACIER   Crystal Lake Cave, Dubuque, IA - The PIPE ORGAN   Crystal Lake Cave, Dubuque, IA -On the way OUT