A cross inlaid in the floor of a library marks the spot where Indiana Jones has to dig to access the ancient ... go to Rome, home of some of the oldest and longest burial underground tunnels ...

In a surprising archaeological discovery, Italian experts have uncovered an underground tunnel that could connect the city of Viterbo to Rome ... an entrance to an ancient tunnel was detected ...

We asked Aicher, author of "Guide to the Aqueducts of Ancient Rome," about the ... but kept the city of Rome clean. Romans used tunnels to get to prized underground springs and bring water through ...

During construction work in a city of central France, archaeologists uncovered a tunnel opening and found a system of ancient Roman passageways. Photos show what remains of the underground structures.