Some of the longest and large tunnels in the world have been either constructed for the purpose of water distribution or are tunnels made for the passage of railways. There are many rail networks in the world and water distribution is also common all across the world and thus tunnels are found in plenty.
Most of these tunnels are pretty long but out of all of these, which exactly are the longest tunnels? To find the answer to this question, you can go through the following given information:
Thirlmere Aqueduct is the longest tunnel in the world and is a water tunnel located in England, UK. This tunnel has a length of 154000 m. With a length of 137000m, Delaware Aqueduct is the second longest tunnel in the entire world and this too is a water supply tunnel.
Paijanne water tunnel in Finland is considered to be the third longest tunnel with a length of 120000 m. Dahuofandg water tunnel which is sued for water supply in China is another really long tunnel and is followed in length by Orange-fish river tunnel in South Africa, Bolmen water tunnel in Sweden and Guangzhou metro line 3 tunnels in China. Tunnel Emisor Oriente is another longest tunnel in the world.