can u imagine a train running through such a tunnel

the top pic is the no of tunnel drives that have been made as shown in section diag. below.

it is the worlds longest tunnel and imagine driving this below 240 m deep near middle of it which makes it deepest railway tunnel of world.

if it doesn't amaze you then let me tell you:

• More than 2,800 tons of explosives were used in the construction of the tunnel.
• One hundred sixty-eight thousand tons of steel was used in the construction of the tunnel. That's enough steel to build four Petronas Towers! (photo above)
  
• The railway track runs 787 feet below the surface of the sea, making it the deepest railway line in the world.
• During construction in 1976, tunnel workers hit a patch of soft rock with disastrous results. Water gushed into the tunnel at a whopping rate of 80 tons per minute. It took more than two months to control the flood. Luckily, no lives were lost.