Indiacon Civil

International

Notable works from partner countries.

Long video

Why Switzerland built the Gotthard Base Tunnel

A flat route under the mountains for freight and passengers.

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Long video

Fehmarnbelt: 18 km under the sea

Precast tunnel elements floated out and lowered into a dredged trench, Denmark to Germany.

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Short

Hoover Dam

A concrete arch-gravity dam on the Colorado River, USA.

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Short

Etihad Rail

A national freight and passenger network across the UAE.

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Short

Millau Viaduct

A cable-stayed viaduct over a valley in France.

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Short

Øresund Bridge: road on top, rail below

A double-deck link between Denmark and Sweden.

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Short

Channel Tunnel: three tunnels under the sea

Two rail tunnels and a service tunnel between the UK and France.

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Short

Melbourne Metro Tunnel

About 9 km of new rail tunnel under an Australian city.

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Short

Gotthard: 57 km under the Alps

The world's longest rail tunnel, in Switzerland.

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Short

Troll A: 472 m tall, floated not lifted

A concrete offshore platform in Norway, built in a fjord and towed out.

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Last reviewed: 23 Oct 2026. Sources: official publications and cited standards, see sources and policy. Report an error: comment on the related video on YouTube.