tunnels and underground excavations: Quick Facts

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Photos and Videos

A small yellow and red rail car sits on narrow tracks inside a curved, wood-lined tunnel of a coal mine in Zabrze, Poland.

Cars driving through the Lincoln Tunnel, with red and yellow lights reflecting off the tiled walls and ceiling.

Gotthard Base Tunnel

A Swiss Federal Railways high-speed train emerges from the concrete portal of the Gotthard Base Tunnel, surrounded by grassy slopes and forested mountains.

Tunnel terminology.

Building a tunnel under the Bosporus strait

Producing explosives: A delicate science

Constructing the world's largest railway tunnel in Switzerland

How an underground labyrinth threatens Rome's monuments

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railroad: Tunnels

Key People

Robert Moses seated at a desk, holding a candlestick telephone to his ear, with papers and office items in front of him.

Robert Moses

American public official

Isambard Kingdom Brunel

Isambard Kingdom Brunel

British engineer

Sir Marc Isambard Brunel

Sir Marc Isambard Brunel

French-born engineer and inventor

Robert Stephenson

Robert Stephenson

British engineer

James Henry Greathead

James Henry Greathead

British engineer

Union Gen. Herman Haupt paddling a pontoon boat of his own design used for inspecting bridges.

Herman Haupt

American engineer

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Alfred Brandt

German engineer

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Germain Sommeiller

French engineer