In addition to a new map, Ticket to Ride: Europe adds three significant new gameplay elements to the original game: ferries, tunnels, and stations.
Ferries: Building a ferry route requires the use of one or more locomotive (wild) cards, depending on the route.
Tunnels: Building tunnels is more risky than building standard routes. When you play the cards to build a tunner, you must also turn over the top three train cards from the deck. If any of them matches the color you are playing, you must add that many of the same color from your hand to finish the tunnel. If you can't, or decide not to, you take back your cards and your turn is over.
Stations: Playing a station allows you to use another player's route to complete a destination ticket. Each player has three stations, Playing the first costs one train card, the second costs two matching train cards, and the third costs three matching train cards. At the end of the game, players score bonus points for any unused statiions.