At the entrance to Oregon Caves, one goes in on a metal grate walkway, with the stream "River Styx," flowing the opposite direction underneath. In Greek and Roman mythology, after death, one entered the gate to the underworld, which was guarded by Cerberus, a three-headed dog. It's purpose was two-fold: to keep the dead from escaping and the living from entering. After passing through the gate, the deceased would cross the River Styx with the ferryman Charon, to reach the final destination, which was overseen by Hades/Pluto. We're crossing Styx on a bridge, so I guess Charon is morosely unemployed. But I was grateful that the park rangers had restrained Cerberus somewhere away from us tourists.