Negrón Tunnel
The Negrón Tunnel is an automotive tunnel which connects the provinces of Asturias and León in Northern Spain . 
<triplet> Asturias <subj> León <obj> shares border with <subj> Spain <obj> country <triplet> León <subj> Asturias <obj> shares border with <subj> Spain <obj> country <triplet> Spain <subj> Asturias <obj> contains administrative territorial entity