This is actually fairly close to the Eurotunnel between England and France. There are windows in the trains but they are very small and entirely useless for the

This is actually fairly close to the Eurotunnel between England and France. There are windows in the trains but they are very small and entirely useless for the 30 minutes whilst you're inside the tunnel. In the Eurotunnel you have to remain in your car - i.e. no standing.