Pittsburgh Line
The Pittsburgh Line spans between the state capitol in Harrisburg and its namesake city of Pittsburgh , crossing the Allegheny Mountains through the Gallitzin Tunnels west of Altoona and the famous Horseshoe Curve in the process . 
<triplet> Gallitzin Tunnels <subj> Pittsburgh Line <obj> carries <triplet> Horseshoe Curve <subj> Pittsburgh Line <obj> carries