` ` Metro envy '' has produced some success in Europe . At 20 meters deep , Toledo tunnel , in Paris , feels filled with light . A meeker design would be overshadowed by the close proximity of the Louvre Museum and surrounding classic architecture . Part of the oldest cities , London 's Westminster is super - futuristic . A Frankfurt advertisement shows a train car crashing through the sidewalk .
` ` Metro envy '' has produced some success in Europe . At 20 meters deep , Toledo tunnel , in Paris , feels filled with light . Part of the oldest cities , London 's Westminster is super - futuristic . A Frankfurt advertisement shows a train car crashing through the sidewalk .