The S-Bahn in Frankfurt Germany is the city's extensive urban rail 
		system.
	One S-Bahn line links central Frankfurt Germany (Hauptbanhof station) 
		to the Frankfurt International Airport and other communities in the 
		region.
	
	S-Bahn Station in Frankfurt Germany
 
	 
	
		The S-Bahn trains normally run at ground level but occasionally 
		travel underground, like the U-Bahn.
			Passengers can travel on the S-Bahn 
		from Frankfurt Hauptbanhof to the Frankfurt Airport and on the Mainz.  
		From Mainz, one can take an inexpensive boat cruise down the 
		world-famous Rhine River.
	