Walter Peck was on his way to a poker game ... Now, tens of thousands of tourists visit Grand Canyon Caverns — the largest dry cave in the United States — every year. Tours range from short ...

Walter Peck discovered the caverns in the 1900s The caverns are actually some 70 miles from the Grand Canyon but the air supply to them runs from the canyon itself via a series of tunnels and ...

A Grand Canyon Caverns business on Thursday was cited for thousands of dollars' worth of safety violations, following an incident from October that stranded tourists underground. Grand Canyon ...