The mysterious tunnel that no one dares to enter. In this video we take a look at this mysterious tunnel that no one dares to enter. Big Bull Tunnel is a short rail tunnel in Virginia. Locating exact information on this infamous tunnel’s origin is difficult. It was discussed in a variety of engineering magazines as far back as 1893, but it had been in use for some time even then. Construction likely occurred sometime in the late 1870s or early 1880s.
