Two related wonders I would like to see are... Gotthard Tunnel... . The Swiss deserve a wonder. A one tile industrial era wonder that allows movement through a mountain tile. Also gives a free trader and route and creates roads from the source city to the tunnel and from the tunnel to the closest player or allied city. Panama Canal ... A two tile industrial wonder that allows the movement of naval units through land tiles. Both ends of the canal must be on coast or adjacent to the city centre.