The Seikan Railroad Tunnel World's Longest Tunnel Record-Breaking Structures At 33 miles long, the Seikan Railroad Tunnel is the world's longest tunnel. From its beginning to its completion, the story of this Japanese tunnel will fascinate even the most reluctant readers. Library Bound Book List: $26.27 / S&L: $19.70 Library Bound Book Reading Level: 2 Interest Level: 2-6 Product type : Library Bound Book ISBN : 978-0-8239-5991-4 Author : Mary Thomas Copyright : 2002 Language : English Category : Social Studies, Technology Pages : 24 Trim : 6" x 9" Dewey : 624.1 ATOS : 3 ARPoints : 0.5 Subject : Social Studies, Technology Binding : Library