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There are many tunnels under the Thames - including several used for trains.
It was in the late 1940s when the second world war was begining ,you will find many tunnels located under the house of 48 thirlmere drive ,the reason for this was because it was an old constrution site.
Move Under Ground has 191 pages.
Ripley Under Ground has 298 pages.
Dartford, Blackwall, Rotherhythe.... and then there are the Underground lines... I just looked it up... the total appears to be 18.
There is 15 tunnels
Tunnels of Blood has 172 pages.
Tunnels - novel - has 464 pages.
The autostrada (A11) from Pisa to Florence features several tunnels, with the most notable being the "Galleria di Montechiari." In total, there are approximately 10 tunnels along this route. These tunnels are designed to facilitate travel through the hilly terrain between the two cities, making the journey smoother and more efficient.
There are 92 tunnels in konkan railway.
Spiral - Tunnels novel - has 429 pages.
There are 16 different merchants underground. Some of traps others of goods, but 16 total. ^_^