Open Parks Network

North portal of Young Pisgah Ridge, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2T.

North and South portals of Buck Springs Tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2T.

West portal of Grassy Knob Tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North portal of Pine Mountain Tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North portal of Grassy Knob Tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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Young Pisgah Ridge tunnel portals, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2T.

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South portal of Pine Mountain Tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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South portal of Ferrin Knob Tunnel #3, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North portal of Ferrin Knob Tunnel #2, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North portal of Ferrin Knob Tunnel #3, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North and South portals of Fork Mountain Tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2T.

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North portal of Ferrin Knob Tunnel #1, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North and South portals of Little Pisgah Tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2T.

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South portal of Ferrin Knob Tunnel #1, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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South portal of Ferrin Knob Tunnel #2, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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Final drawing of portals of Ferrin Knob tunnel #1, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North and south portals of Ferrin Knob tunnel #1, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North and south portals of Ferrin Knob tunnel #3, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North and south portals of Ferrin Knob tunnel #2, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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Topography and alignment, north and south portals of Ferrin Knob tunnel #2, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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Topography and alignment, north and south portals of Ferrin Knob tunnel #3, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2S.

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North and South portals of Little Pisgah Tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North & South Portals - Little Pisgah Tunnel, North Carolina Section 2T.

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1964-01-07

Final drawing of portals of Ferrin Knob tunnel #2, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North & South Tunnel Portals, Ferrin Knob #2 (401.3), North Carolina Section 2S.

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1963-12-06

Final drawing of portals of Ferrin Knob tunnel #3, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North & South Tunnel Portals, Ferrin Knob #3 (401.5), North Carolina Section 2S.

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1963-12-06

Man-made tunnel Jean Lafitte National Historical Park and Preserve

1980

Photograph of people in old tunnel Jean Lafitte National Historical Park and Preserve

Circa 1986

Mary's Rock Tunnel, Shenandoah National Park, Virginia Kings Mountain National Military Park Mary's Rock Tunnel

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Mary's Rock Tunnel, Shenandoah National Park, Virginia Kings Mountain National Military Park mars Rock Tunnel, South portal

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Ring stone detail Blue Ridge Parkway Virginia, Section 1G.

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1956-06-04

Tunnel topographic study Blue Ridge Parkway Virginia, Section 1G.

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1956-06-01

South portal of tunnel at station 778, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2P.

Tunnel portal plan and elevation Blue Ridge Parkway Virginia, Section 1G.

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1956-06-01

Structural Inspection and O National Park Service Water Resources Division; National Park Service

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1993-08

Tunnel portal dimensioned masonry, Blue Ridge Parkway, North Carolina Blue Ridge Parkway Tunnel Portal Dimensioned Masonry - 2P5, North Carolina Section 2P.

1950-05-15

Old stone tunnel under leaves South Carolina State Parks Written on slide: 14

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Yellowstone photo album 7, page 73 Yellowstone National Park

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Circa 1925
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Tunnel portal plan and elevation Blue Ridge Parkway Tunnel Portal #2, Sta 162+38.5, Virginia, Section 1G.

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1956-02-01

Tunnel portal ring stone detail Blue Ridge Parkway Tunnel Portal #2, Sta 162+38.5, Virginia, Section 1G.

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1956-02-02

Feature brick wall or tunnel underground South Carolina State Parks Written on slide: 1

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Craggy flats tunnel north portal, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2P.

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Portals for Craggy Pinnacle tunnel, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2P.

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Craggy flats tunnel south portal, Blue Ridge Parkway, North Carolina Blue Ridge Parkway North Carolina Section 2P.

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Loop Tunnel construction, circa 1935 Great Smoky Mountains National Park Loop Tunnel; Construction; II-S-16190, Physical Facilities - Roads - Structures on roads (tunnels, trail underpass, box culverts, trestles).