Great Northern Tunnel

The Great Northern Tunnel is a one mile (1.6 km) railway tunnel under downtown Seattle, Washington, completed by the Great Northern Railway in 1905. King Street Station is just south of the southern portal. At the time it was built, the tunnel was the highest and widest in the United States at 28 feet high (8.5 m) and 30 feet wide (9.1 m). Freight and passenger trains use this tunnel today, including Amtrak routes to Chicago ("Empire Builder") and Vancouver, B.C. ("Cascades"), as well as Sound Transit's Seattle-Everett "Sounder" commuter train.

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Bridges and Tunnels in and around Seattle
Road bridges:		Alaskan Way Viaduct \| Ballard Bridge \| Evergreen Point Floating Bridge \| First Avenue South Bridge \| Fremont Bridge \| George Washington Memorial Bridge (Aurora Bridge) \| Homer M. Hadley Memorial Bridge (Third Lake Washington Floating Bridge) \| Lacey V. Murrow Memorial Bridge (I-90 Floating Bridge) \| Magnolia Bridge \| Montlake Bridge \| Ship Canal Bridge \| South Park (14th/16th Ave) Bridge \| Spokane Street Bridge \| University Bridge \| West Seattle Bridge
Rail bridges/trestles:		Salmon Bay Bridge \| Wilburton Trestle
Tunnels:		Battery Street Tunnel \| Great Northern Tunnel \| Mercer Island Lid \| Metro Bus Tunnel \| Mount Baker Tunnel