One cannot discuss the Daniel Boone Tunnel without talking about the Brooklyn Bridge. The iron truss bridge with wooden planking was first constructed in 1871 and therefore the tunnel along with it. The Daniel Boone Tunnel, the first highway tunnel in the state of Kentucky, joined the Brooklyn Bridge on the northern side of the Kentucky River.

As one can see, the original bridge bridge is no longer in place. Its demise of the bridge has its own tale. This bridge was built for 19th century traffic and it did handle the stresses as the means of transportation improved. In 1955 a food service delivery truck was traveling south on the bridge, and one complete span of the bridge collapsed into the river under its weight. The fall broke the drivers back in three places, but he managed to get out of the truck, thinking it might catch on fire. He survived, sued the state, and was awarded $50,000. As proof of his benevolence, the Governor reduced the award to $10,000 saying that no man was worth $50,000. Touching...
What remains is the Daniel boone Tunnel. The bridge was torn down and replaced by the moern-day bridge. The tunnel has not faired well after 50 plus years of neglect, but it makes for an excellent place for a cache.
The cache is a camouflaged container with log only. As always, bring your own writing instrument. The coordinates are a bit sketchy due to the surroundings. No climbing is needed and the cache is not close to the cliff's edge. If you find yourself in a precarious situation, you are not looking in the right spot. Stay safe.